CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Cash flows from operating activities      
Net income $ 2,882,000,000 $ 2,001,000,000 $ 2,213,000,000
(Income) loss from discontinued operations, net of tax 1,000,000 (2,000,000) (1,000,000)
Income from continuing operations 2,883,000,000 1,999,000,000 2,212,000,000
Adjustments to reconcile to net cash provided by (used in) operating activities from continuing operations, net of the effect of acquisitions and divestitures      
Depreciation and amortization 568,000,000 550,000,000 515,000,000
Stock-based compensation 165,000,000 173,000,000 151,000,000
Gain on sale of equity method investment 0 0 (158,000,000)
Loss on repayment of long-term debt 0 39,000,000 0
Deferred income taxes (24,000,000) 252,000,000 133,000,000
Changes in assets and liabilities      
Receivables, net (327,000,000) (157,000,000) 18,000,000
Contract assets and contract liabilities 28,000,000 88,000,000 (645,000,000)
Inventories (166,000,000) 14,000,000 (10,000,000)
Prepaid expenses and other current assets 73,000,000 204,000,000 205,000,000
Income taxes receivable/payable 174,000,000 (193,000,000) (185,000,000)
Accounts payable 406,000,000 (94,000,000) 152,000,000
Accrued employee compensation 165,000,000 111,000,000 77,000,000
Other current liabilities (108,000,000) 106,000,000 (41,000,000)
Accrued retiree benefits (421,000,000) (250,000,000) 419,000,000
Other, net 12,000,000 (95,000,000) 9,000,000
Net cash provided by (used in) operating activities from continuing operations 3,428,000,000 2,747,000,000 2,852,000,000
Net cash provided by (used in) operating activities from discontinued operations 0 (2,000,000) 0
Net cash provided by (used in) operating activities 3,428,000,000 2,745,000,000 2,852,000,000
Cash flows from investing activities      
Additions to property, plant and equipment (763,000,000) (543,000,000) (561,000,000)
Proceeds from sales of property, plant and equipment 2,000,000 46,000,000 34,000,000
Additions to capitalized internal use software (58,000,000) (68,000,000) (64,000,000)
Purchases of short-term investments 0 (696,000,000) (472,000,000)
Maturities of short-term investments 309,000,000 517,000,000 1,184,000,000
Payments for purchases of acquired companies, net of cash received 0 (93,000,000) (57,000,000)
Proceeds from sale of business, net of transaction costs 11,000,000 0 0
Other (22,000,000) 20,000,000 (11,000,000)
Net cash provided by (used in) investing activities (521,000,000) (817,000,000) 53,000,000
Cash flows from financing activities      
Dividends paid (975,000,000) (910,000,000) (850,000,000)
Net borrowings (payments) on commercial paper 0 300,000,000 0
Repayments of long-term debt 0 (591,000,000) 0
Loss on repayment of long-term debt 0 (38,000,000) 0
Acquisition of noncontrolling interest in RCCS LLC 0 0 (90,000,000)
Contribution from noncontrolling interest in Forcepoint 0 8,000,000 11,000,000
Other (5,000,000) 0 (5,000,000)
Net cash provided by (used in) financing activities (2,398,000,000) (2,116,000,000) (1,930,000,000)
Net increase (decrease) in cash, cash equivalents and restricted cash 509,000,000 (188,000,000) 975,000,000
Cash, cash equivalents and restricted cash at beginning of year 3,115,000,000 3,303,000,000 2,328,000,000
Cash, cash equivalents and restricted cash at end of year 3,624,000,000 3,115,000,000 3,303,000,000
Share Repurchase Program [Member]      
Cash flows from financing activities      
Repurchases of common stock under share repurchase programs (1,325,000,000) (800,000,000) (900,000,000)
Satisfy tax withholding [Member]      
Cash flows from financing activities      
Repurchases of common stock under share repurchase programs $ (93,000,000) $ (85,000,000) $ (96,000,000)