Fresh Start Accounting - Balance Sheet (Details) - USD ($)
$ in Millions
Dec. 16, 2017
Dec. 15, 2017
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   $ 0
Additional paid-in capital   0
Current assets:    
Cash and cash equivalents $ 366 366
Accounts receivable, net 391  
Inventory 119  
Other current assets 250  
TOTAL CURRENT ASSETS 1,126  
Property, plant and equipment, net 310 310
Deferred income taxes, net 31  
Intangible assets, net 3,435 3,435
Goodwill 2,658 2,658
Other assets 49  
TOTAL ASSETS 7,609  
Current liabilities:    
Debt maturing within one year 29  
Accounts payable 276  
Payroll and benefit obligations 146  
Deferred revenue 336  
Business restructuring reserve 38  
Other current liabilities 159  
TOTAL CURRENT LIABILITIES 984  
Non-current liabilities:    
Long-term debt, net of current portion 2,867  
Pension obligations 785  
Other post-retirement obligations 212  
Deferred income taxes, net 689  
Business restructuring reserve 34  
Other liabilities 370  
TOTAL NON-CURRENT LIABILITIES 4,957  
LIABILITIES SUBJECT TO COMPROMISE 0 0
TOTAL LIABILITIES 5,941  
Commitments and contingencies    
Equity awards on redeemable shares 0  
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock 1  
Additional paid-in capital 1,667  
(Accumulated deficit) retained earnings 0  
Accumulated other comprehensive (loss) income 0  
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY 1,668 1,668
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY 7,609  
Discharge of Debt    
Current assets:    
Cash and cash equivalents   (404)
Accounts receivable, net   0
Inventory   0
Other current assets   (58)
TOTAL CURRENT ASSETS   (462)
Property, plant and equipment, net   0
Deferred income taxes, net   48
Intangible assets, net   0
Goodwill   0
Other assets   6
TOTAL ASSETS   (408)
Current liabilities:    
Debt maturing within one year   (696)
Accounts payable   (49)
Payroll and benefit obligations   23
Deferred revenue   50
Business restructuring reserve   3
Other current liabilities   65
TOTAL CURRENT LIABILITIES   (604)
Non-current liabilities:    
Long-term debt, net of current portion   2,771
Pension obligations   246
Other post-retirement obligations   212
Deferred income taxes, net   113
Business restructuring reserve   4
Other liabilities   233
TOTAL NON-CURRENT LIABILITIES   3,579
LIABILITIES SUBJECT TO COMPROMISE   (7,585)
TOTAL LIABILITIES   (4,610)
Commitments and contingencies    
Equity awards on redeemable shares   (6)
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   1
Additional paid-in capital   1,667
(Accumulated deficit) retained earnings   4,846
Accumulated other comprehensive (loss) income   664
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   4,791
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   (408)
Revaluation of Assets    
Current assets:    
Cash and cash equivalents   0
Accounts receivable, net   (106)
Inventory   29
Other current assets   (66)
TOTAL CURRENT ASSETS   (143)
Property, plant and equipment, net   116
Deferred income taxes, net   (17)
Intangible assets, net   3,137
Goodwill   (883)
Other assets   (27)
TOTAL ASSETS   2,183
Revaluation of Liabilities    
Current liabilities:    
Debt maturing within one year   0
Accounts payable   0
Payroll and benefit obligations   0
Deferred revenue   (341)
Business restructuring reserve   0
Other current liabilities   (3)
TOTAL CURRENT LIABILITIES   (344)
Non-current liabilities:    
Long-term debt, net of current portion   96
Pension obligations   0
Other post-retirement obligations   0
Deferred income taxes, net   548
Business restructuring reserve   4
Other liabilities   (43)
TOTAL NON-CURRENT LIABILITIES   605
LIABILITIES SUBJECT TO COMPROMISE   0
TOTAL LIABILITIES   261
Exchange of Stock for Stock    
Commitments and contingencies    
Equity awards on redeemable shares   0
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
(Accumulated deficit) retained earnings   1,132
Accumulated other comprehensive (loss) income   790
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   1,922
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   2,183
Predecessor    
Current assets:    
Cash and cash equivalents   770
Accounts receivable, net   497
Inventory   90
Other current assets   374
TOTAL CURRENT ASSETS   1,731
Property, plant and equipment, net   194
Deferred income taxes, net   0
Intangible assets, net   298
Goodwill   3,541
Other assets   70
TOTAL ASSETS   5,834
Current liabilities:    
Debt maturing within one year   725
Accounts payable   325
Payroll and benefit obligations   123
Deferred revenue   627
Business restructuring reserve   35
Other current liabilities   97
TOTAL CURRENT LIABILITIES   1,932
Non-current liabilities:    
Long-term debt, net of current portion   0
Pension obligations   539
Other post-retirement obligations   0
Deferred income taxes, net   28
Business restructuring reserve   26
Other liabilities   180
TOTAL NON-CURRENT LIABILITIES   773
LIABILITIES SUBJECT TO COMPROMISE   7,585
TOTAL LIABILITIES   10,290
Commitments and contingencies    
Equity awards on redeemable shares   6
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   2,387
(Accumulated deficit) retained earnings   (5,978)
Accumulated other comprehensive (loss) income   (1,454)
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   (5,045)
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   5,834
Current assets:    
Goodwill   (883)
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock 0  
Additional paid-in capital 0  
Predecessor | Discharge of Debt    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   (2,387)
Predecessor | Exchange of Stock for Stock    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
Series B Preferred Stock    
Commitments and contingencies    
Preferred stock: 0  
Series B Preferred Stock | Discharge of Debt    
Commitments and contingencies    
Preferred stock:   (397)
Series B Preferred Stock | Exchange of Stock for Stock    
Commitments and contingencies    
Preferred stock:   0
Series B Preferred Stock | Predecessor    
Commitments and contingencies    
Preferred stock:   397
Series A Preferred Stock    
Commitments and contingencies    
Preferred stock: 0  
Series A Preferred Stock | Discharge of Debt    
Commitments and contingencies    
Preferred stock:   (186)
Series A Preferred Stock | Exchange of Stock for Stock    
Commitments and contingencies    
Preferred stock:   0
Series A Preferred Stock | Predecessor    
Commitments and contingencies    
Preferred stock:   186
As Previously Reported    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
Current assets:    
Goodwill   (909)
STOCKHOLDERS' (DEFICIT) EQUITY    
(Accumulated deficit) retained earnings   4,872
Current assets:    
Cash and cash equivalents 340 340
Accounts receivable, net 417  
Inventory 119  
Other current assets 250  
TOTAL CURRENT ASSETS 1,126  
Property, plant and equipment, net 310  
Deferred income taxes, net 31  
Intangible assets, net 3,435 3,435
Goodwill 2,632 2,632
Other assets 49  
TOTAL ASSETS 7,583 7,583
Current liabilities:    
Debt maturing within one year 29  
Accounts payable 276  
Payroll and benefit obligations 146  
Deferred revenue 336  
Business restructuring reserve 38  
Other current liabilities 159  
TOTAL CURRENT LIABILITIES 984  
Non-current liabilities:    
Long-term debt, net of current portion 2,867  
Pension obligations 785  
Other post-retirement obligations 212  
Deferred income taxes, net 689  
Business restructuring reserve 34  
Other liabilities 370  
TOTAL NON-CURRENT LIABILITIES 4,957  
LIABILITIES SUBJECT TO COMPROMISE 0  
TOTAL LIABILITIES 5,941  
Commitments and contingencies    
Equity awards on redeemable shares 0  
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock 1  
Additional paid-in capital 1,641  
(Accumulated deficit) retained earnings 0  
Accumulated other comprehensive (loss) income 0  
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY 1,642 1,642
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY 7,583  
As Previously Reported | Discharge of Debt    
Current assets:    
Cash and cash equivalents   (404)
Accounts receivable, net   0
Inventory   0
Other current assets   (58)
TOTAL CURRENT ASSETS   (462)
Property, plant and equipment, net   0
Deferred income taxes, net   48
Intangible assets, net   0
Goodwill   0
Other assets   6
TOTAL ASSETS   (408)
Current liabilities:    
Debt maturing within one year   (696)
Accounts payable   (49)
Payroll and benefit obligations   23
Deferred revenue   50
Business restructuring reserve   3
Other current liabilities   65
TOTAL CURRENT LIABILITIES   (604)
Non-current liabilities:    
Long-term debt, net of current portion   2,771
Pension obligations   246
Other post-retirement obligations   212
Deferred income taxes, net   113
Business restructuring reserve   4
Other liabilities   233
TOTAL NON-CURRENT LIABILITIES   3,579
LIABILITIES SUBJECT TO COMPROMISE   (7,585)
TOTAL LIABILITIES   (4,610)
Commitments and contingencies    
Equity awards on redeemable shares   (6)
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   1
Additional paid-in capital   1,641
(Accumulated deficit) retained earnings   4,872
Accumulated other comprehensive (loss) income   664
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   4,791
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   (408)
As Previously Reported | Revaluation of Assets    
Current assets:    
Cash and cash equivalents   0
Accounts receivable, net   (106)
Inventory   29
Other current assets   (66)
TOTAL CURRENT ASSETS   (143)
Property, plant and equipment, net   116
Deferred income taxes, net   (17)
Intangible assets, net   3,137
Goodwill   (909)
Other assets   (27)
TOTAL ASSETS   2,157
As Previously Reported | Revaluation of Liabilities    
Current liabilities:    
Debt maturing within one year   0
Accounts payable   0
Payroll and benefit obligations   0
Deferred revenue   (341)
Business restructuring reserve   0
Other current liabilities   (3)
TOTAL CURRENT LIABILITIES   (344)
Non-current liabilities:    
Long-term debt, net of current portion   96
Pension obligations   0
Other post-retirement obligations   0
Deferred income taxes, net   548
Business restructuring reserve   4
Other liabilities   (43)
TOTAL NON-CURRENT LIABILITIES   605
LIABILITIES SUBJECT TO COMPROMISE   0
TOTAL LIABILITIES   261
As Previously Reported | Exchange of Stock for Stock    
Commitments and contingencies    
Equity awards on redeemable shares   0
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
(Accumulated deficit) retained earnings   1,106
Accumulated other comprehensive (loss) income   790
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   1,896
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   2,157
As Previously Reported | Predecessor    
Current assets:    
Cash and cash equivalents   744
Accounts receivable, net   523
Inventory   90
Other current assets   374
TOTAL CURRENT ASSETS   1,731
Property, plant and equipment, net   194
Deferred income taxes, net   0
Intangible assets, net   298
Goodwill   3,541
Other assets   70
TOTAL ASSETS   5,834
Current liabilities:    
Debt maturing within one year   725
Accounts payable   325
Payroll and benefit obligations   123
Deferred revenue   627
Business restructuring reserve   35
Other current liabilities   97
TOTAL CURRENT LIABILITIES   1,932
Non-current liabilities:    
Long-term debt, net of current portion   0
Pension obligations   539
Other post-retirement obligations   0
Deferred income taxes, net   28
Business restructuring reserve   26
Other liabilities   180
TOTAL NON-CURRENT LIABILITIES   773
LIABILITIES SUBJECT TO COMPROMISE   7,585
TOTAL LIABILITIES   10,290
Commitments and contingencies    
Equity awards on redeemable shares   6
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   2,387
(Accumulated deficit) retained earnings   (5,978)
Accumulated other comprehensive (loss) income   (1,454)
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   (5,045)
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   5,834
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock 0  
Additional paid-in capital 0  
As Previously Reported | Predecessor | Discharge of Debt    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   (2,387)
As Previously Reported | Predecessor | Exchange of Stock for Stock    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
As Previously Reported | Series B Preferred Stock    
Commitments and contingencies    
Preferred stock: 0  
As Previously Reported | Series B Preferred Stock | Discharge of Debt    
Commitments and contingencies    
Preferred stock:   (397)
As Previously Reported | Series B Preferred Stock | Exchange of Stock for Stock    
Commitments and contingencies    
Preferred stock:   0
As Previously Reported | Series B Preferred Stock | Predecessor    
Commitments and contingencies    
Preferred stock:   397
As Previously Reported | Series A Preferred Stock    
Commitments and contingencies    
Preferred stock: 0  
As Previously Reported | Series A Preferred Stock | Discharge of Debt    
Commitments and contingencies    
Preferred stock:   (186)
As Previously Reported | Series A Preferred Stock | Exchange of Stock for Stock    
Commitments and contingencies    
Preferred stock:   0
As Previously Reported | Series A Preferred Stock | Predecessor    
Commitments and contingencies    
Preferred stock:   186
Adjustments    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
STOCKHOLDERS' (DEFICIT) EQUITY    
(Accumulated deficit) retained earnings   (26)
Current assets:    
Cash and cash equivalents 26 26
Accounts receivable, net (26)  
Inventory 0  
Other current assets 0  
TOTAL CURRENT ASSETS 0  
Property, plant and equipment, net 0  
Deferred income taxes, net 0  
Intangible assets, net 0 0
Goodwill 26 26
Other assets 0  
TOTAL ASSETS 26 26
Current liabilities:    
Debt maturing within one year 0  
Accounts payable 0  
Payroll and benefit obligations 0  
Deferred revenue 0  
Business restructuring reserve 0  
Other current liabilities 0  
TOTAL CURRENT LIABILITIES 0  
Non-current liabilities:    
Long-term debt, net of current portion 0  
Pension obligations 0  
Other post-retirement obligations 0  
Deferred income taxes, net 0  
Business restructuring reserve 0  
Other liabilities 0  
TOTAL NON-CURRENT LIABILITIES 0  
LIABILITIES SUBJECT TO COMPROMISE 0  
TOTAL LIABILITIES 0  
Commitments and contingencies    
Equity awards on redeemable shares 0  
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock 0  
Additional paid-in capital 26  
(Accumulated deficit) retained earnings 0  
Accumulated other comprehensive (loss) income 0  
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY 26 26
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY 26  
Adjustments | Discharge of Debt    
Current assets:    
Cash and cash equivalents   0
Accounts receivable, net   0
Inventory   0
Other current assets   0
TOTAL CURRENT ASSETS   0
Property, plant and equipment, net   0
Deferred income taxes, net   0
Intangible assets, net   0
Goodwill   0
Other assets   0
TOTAL ASSETS   0
Current liabilities:    
Debt maturing within one year   0
Accounts payable   0
Payroll and benefit obligations   0
Deferred revenue   0
Business restructuring reserve   0
Other current liabilities   0
TOTAL CURRENT LIABILITIES   0
Non-current liabilities:    
Long-term debt, net of current portion   0
Pension obligations   0
Other post-retirement obligations   0
Deferred income taxes, net   0
Business restructuring reserve   0
Other liabilities   0
TOTAL NON-CURRENT LIABILITIES   0
LIABILITIES SUBJECT TO COMPROMISE   0
TOTAL LIABILITIES   0
Commitments and contingencies    
Equity awards on redeemable shares   0
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   26
(Accumulated deficit) retained earnings   (26)
Accumulated other comprehensive (loss) income   0
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   0
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   0
Adjustments | Revaluation of Assets    
Current assets:    
Cash and cash equivalents   0
Accounts receivable, net   0
Inventory   0
Other current assets   0
TOTAL CURRENT ASSETS   0
Property, plant and equipment, net   0
Deferred income taxes, net   0
Intangible assets, net   0
Goodwill   26
Other assets   0
TOTAL ASSETS   26
Adjustments | Revaluation of Liabilities    
Current liabilities:    
Debt maturing within one year   0
Accounts payable   0
Payroll and benefit obligations   0
Deferred revenue   0
Business restructuring reserve   0
Other current liabilities   0
TOTAL CURRENT LIABILITIES   0
Non-current liabilities:    
Long-term debt, net of current portion   0
Pension obligations   0
Other post-retirement obligations   0
Deferred income taxes, net   0
Business restructuring reserve   0
Other liabilities   0
TOTAL NON-CURRENT LIABILITIES   0
LIABILITIES SUBJECT TO COMPROMISE   0
TOTAL LIABILITIES   0
Adjustments | Exchange of Stock for Stock    
Commitments and contingencies    
Equity awards on redeemable shares   0
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
(Accumulated deficit) retained earnings   26
Accumulated other comprehensive (loss) income   0
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   26
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   26
Adjustments | Predecessor    
Current assets:    
Cash and cash equivalents   26
Accounts receivable, net   (26)
Inventory   0
Other current assets   0
TOTAL CURRENT ASSETS   0
Property, plant and equipment, net   0
Deferred income taxes, net   0
Intangible assets, net   0
Goodwill   0
Other assets   0
TOTAL ASSETS   0
Current liabilities:    
Debt maturing within one year   0
Accounts payable   0
Payroll and benefit obligations   0
Deferred revenue   0
Business restructuring reserve   0
Other current liabilities   0
TOTAL CURRENT LIABILITIES   0
Non-current liabilities:    
Long-term debt, net of current portion   0
Pension obligations   0
Other post-retirement obligations   0
Deferred income taxes, net   0
Business restructuring reserve   0
Other liabilities   0
TOTAL NON-CURRENT LIABILITIES   0
LIABILITIES SUBJECT TO COMPROMISE   0
TOTAL LIABILITIES   0
Commitments and contingencies    
Equity awards on redeemable shares   0
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
(Accumulated deficit) retained earnings   0
Accumulated other comprehensive (loss) income   0
TOTAL STOCKHOLDERS' (DEFICIT) EQUITY   0
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY   0
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock 0  
Additional paid-in capital 0  
Adjustments | Predecessor | Discharge of Debt    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
Adjustments | Predecessor | Exchange of Stock for Stock    
STOCKHOLDERS' (DEFICIT) EQUITY    
Common stock   0
Additional paid-in capital   0
Adjustments | Series B Preferred Stock    
Commitments and contingencies    
Preferred stock: 0  
Adjustments | Series B Preferred Stock | Discharge of Debt    
Commitments and contingencies    
Preferred stock:   0
Adjustments | Series B Preferred Stock | Exchange of Stock for Stock    
Commitments and contingencies    
Preferred stock:   0
Adjustments | Series B Preferred Stock | Predecessor    
Commitments and contingencies    
Preferred stock:   0
Adjustments | Series A Preferred Stock    
Commitments and contingencies    
Preferred stock: $ 0  
Adjustments | Series A Preferred Stock | Discharge of Debt    
Commitments and contingencies    
Preferred stock:   0
Adjustments | Series A Preferred Stock | Exchange of Stock for Stock    
Commitments and contingencies    
Preferred stock:   0
Adjustments | Series A Preferred Stock | Predecessor    
Commitments and contingencies    
Preferred stock:   $ 0