Long-Term Debt (Details)
|
|
1 Months Ended |
12 Months Ended |
|
|
|
May. 22, 2013
USD ($)
|
Oct. 31, 2014
USD ($)
$ / unit
|
Sep. 30, 2014
USD ($)
|
Jan. 30, 2016
USD ($)
|
Jan. 31, 2015
USD ($)
|
Feb. 01, 2014
USD ($)
|
[1] |
Nov. 01, 2014
USD ($)
|
Aug. 02, 2014
USD ($)
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Net proceeds from issuance of long-term debt |
|
|
|
|
$ 0
|
|
$ 893,000,000
|
[1] |
$ 2,180,000,000
|
|
|
| Loss on extinguishment of debt |
|
|
|
|
(10,000,000)
|
|
(34,000,000)
|
[1] |
$ (114,000,000)
|
|
|
| Extinguishment of Debt, Amount |
|
|
|
|
494,000,000
|
|
|
|
|
|
|
| 6.875% Medium-term Notes due 2015 [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Unsecured Long-term Debt, Noncurrent |
|
|
|
|
|
|
|
|
|
$ 60,000,000
|
$ 200,000,000
|
| Tender Premium | $ / unit |
[2] |
|
67.50
|
|
|
|
|
|
|
|
|
| Principal Amount Tendered |
|
|
$ 140,000,000
|
|
|
|
|
|
|
|
|
| Extinguishment of Debt, Amount |
|
|
140,000,000
|
|
|
|
|
|
|
|
|
| 8.125% Senior Notes Due 2019 (6) |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Unsecured Long-term Debt, Noncurrent |
|
|
|
$ 400,000,000
|
$ 400,000,000
|
[3] |
$ 400,000,000
|
[3] |
|
|
|
| Debt instrument, stated interest rate (percent) |
|
|
|
8.125%
|
8.125%
|
|
8.125%
|
|
|
|
|
| Net proceeds from issuance of long-term debt |
|
|
|
$ 393,000,000
|
|
|
|
|
|
|
|
| Premium Paid [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Loss on extinguishment of debt |
|
|
(29,000,000)
|
|
|
|
|
|
|
|
|
| Reacquisition Costs [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Loss on extinguishment of debt |
|
|
$ (1,000,000)
|
|
|
|
|
|
|
|
|
| Debt Defeasance [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
|
6.875%
|
|
|
|
|
|
|
|
|
| Loss on extinguishment of debt |
|
|
$ (4,000,000)
|
|
|
|
|
|
|
|
|
| Extinguishment of Debt, Amount |
|
|
$ 64,000,000
|
|
|
|
|
|
|
|
|
| 7.65% Debentures due 2016 [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Unsecured Long-term Debt, Noncurrent |
|
|
|
|
|
|
|
|
|
78,000,000
|
200,000,000
|
| Tender Premium | $ / unit |
[2] |
|
105.00
|
|
|
|
|
|
|
|
|
| Principal Amount Tendered |
|
|
$ 122,000,000
|
|
|
|
|
|
|
|
|
| Extinguishment of Debt, Amount |
|
|
$ 122,000,000
|
|
|
|
|
|
|
|
|
| 7.95% Debentures due 2017 [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Unsecured Long-term Debt, Noncurrent |
|
|
|
|
|
|
|
|
|
220,000,000
|
285,000,000
|
| Tender Premium | $ / unit |
[2] |
|
97.50
|
|
|
|
|
|
|
|
|
| Principal Amount Tendered |
|
|
$ 194,000,000
|
|
|
|
|
|
|
|
|
| Extinguishment of Debt, Amount |
|
|
65,000,000
|
|
|
|
|
|
|
|
|
| 2014 Tender Offer [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Repayments of Unsecured Debt |
|
|
362,000,000
|
|
|
|
|
|
|
|
|
| Unsecured Long-term Debt, Noncurrent |
|
|
|
|
|
|
|
|
|
$ 358,000,000
|
$ 685,000,000
|
| Principal Amount Tendered |
|
|
456,000,000
|
|
|
|
|
|
|
|
|
| Accrued Interest Expense, Debt |
|
|
6,000,000
|
|
|
|
|
|
|
|
|
| Loss on extinguishment of debt |
|
|
(30,000,000)
|
|
|
|
|
|
|
|
|
| Extinguishment of Debt, Amount |
|
|
$ 327,000,000
|
|
|
|
|
|
|
|
|
| 2013 Term Loan Facility (7) |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| 2013 Term Loan Facility, face amount |
|
$ 2,250,000,000.00
|
|
|
|
|
|
|
|
|
|
| 2013 Term Loan Facility, term |
|
5 years
|
|
|
|
|
|
|
|
|
|
| 2013 Term Loan Facility, basis spread on variable interest rate |
|
5.00%
|
|
|
|
|
|
|
|
|
|
| 2013 Term Loan Facility, required quarterly principal payment |
|
|
|
|
$ 5,625,000.000
|
|
|
|
|
|
|
|
|