Financing (Schedule of Company Debt) (Details) - USD ($) $ in Millions	Feb. 02, 2019	Feb. 03, 2018
2.875% Senior notes due 2023 [Member]
Debt instrument, principal outstanding	$ 750	$ 750
Debt instrument interest rate, stated percentage	2.875%
3.875% Senior notes due 2022 [Member]
Debt instrument, principal outstanding	$ 550	550
Debt instrument interest rate, stated percentage	3.875%
4.5% Senior notes due 2034 [Member]
Debt instrument, principal outstanding	$ 367	550
Debt instrument interest rate, stated percentage	4.50%
3.45% senior notes due 2021 [Member]
Debt instrument, principal outstanding	$ 500	500
Debt instrument interest rate, stated percentage	3.45%
3.625% senior notes due 2024 [Member]
Debt instrument, principal outstanding	$ 500	500
Debt instrument interest rate, stated percentage	3.625%
4.375% Senior notes due 2023 [Member]
Debt instrument, principal outstanding	$ 400	400
Debt instrument interest rate, stated percentage	4.375%
5.125% Senior debentures due 2042 [Member]
Debt instrument, principal outstanding	$ 250	250
Debt instrument interest rate, stated percentage	5.125%
4.3% Senior notes due 2043 [Member]
Debt instrument, principal outstanding	$ 250	250
Debt instrument interest rate, stated percentage	4.30%
Six Point Seven Percent Senior Debentures Due Two Thousand Thirty Four [Member]
Debt instrument, principal outstanding	$ 201	$ 264
Debt instrument interest rate, stated percentage	6.70%	6.70%
6.9% senior debentures due 2029 [Member]
Debt instrument, principal outstanding	$ 192	$ 397
Debt instrument interest rate, stated percentage	6.90%
Six Point Three Seven Five Percent Senior Notes Due Two Thousand Thirty Seven [Member]
Debt instrument, principal outstanding	$ 192	$ 269
Debt instrument interest rate, stated percentage	6.375%	6.375%
6.65% senior debentures due 2024 [Member]
Debt instrument, principal outstanding	$ 122	$ 296
Debt instrument interest rate, stated percentage	6.65%
Seven Percent Senior Debentures Due Two Thousand Twenty Eight [Member]
Debt instrument interest rate, stated percentage	7.00%
7.0% senior debentures due 2028 [Member]
Debt instrument, principal outstanding	$ 117	298
Debt instrument interest rate, stated percentage	7.00%
6.7% Senior Debentures Due 2028 [Member]
Debt instrument, principal outstanding	$ 103	197
Debt instrument interest rate, stated percentage	6.70%
6.79% Senior Debentures Due 2027 [Member]
Debt instrument, principal outstanding	$ 71	165
Debt instrument interest rate, stated percentage	6.79%
6.9% senior debentures due 2032 [Member]
Debt instrument, principal outstanding	$ 17	31
8.5% Senior Debentures Due 2019 [Member]
Debt instrument, principal outstanding	$ 0	36
Debt instrument interest rate, stated percentage	8.50%
10.25% Senior Debentures Due 2021 [Member]
Debt instrument, principal outstanding	$ 33	33
Debt instrument interest rate, stated percentage	10.25%
7.6% Senior Debentures Due 2025 [Member]
Debt instrument, principal outstanding	$ 24	24
Debt instrument interest rate, stated percentage	7.60%
Eight Point Seven Five Percent Senior Debentures Due Two Thousand Twenty Nine [Member]
Debt instrument, principal outstanding	$ 13	$ 18
Debt instrument interest rate, stated percentage	8.75%	8.75%
Seven Point Eight Seven Five Percent Senior Debentures Due Two Thousand Thirty [Member]
Debt instrument, principal outstanding	$ 10	$ 12
Debt instrument interest rate, stated percentage	7.875%	7.875%
9.5% Amortizing Debentures Due 2021 [Member]
Debt instrument, principal outstanding	$ 6	$ 10
Debt instrument interest rate, stated percentage	9.50%
9.75% Amortizing Debentures Due 2021 [Member]
Debt instrument, principal outstanding	$ 3	6
Debt instrument interest rate, stated percentage	9.75%
Seven Point Eight Seven Five Percent Senior Debentures Due Two Thousand Thirty Six [Member]
Debt instrument interest rate, stated percentage	7.875%
Unamortized debit issue costs [Member]
Unamortized debt issue costs	$ (18)	(25)
Unamortized debit discount [Member]
Unamortized debt discount	(9)	(13)
Premium on acquired debt
Debt Instrument, Unamortized Premium, Noncurrent	$ 39	67
Premium on acquired debt | Minimum [Member]
Debt instrument interest rate, effective percentage	5.542%
Premium on acquired debt | Maximum [Member]
Debt instrument interest rate, effective percentage	7.144%
Capital Lease and Other Long-Term Obligations [Member]
Debt instrument, principal outstanding	$ 25	26
Total Of Long Term Debt [Member]
Debt instrument, principal outstanding	$ 4,708	5,861
seven point four five senior debentures due 2017 [Member]
Debt instrument interest rate, stated percentage	7.45%
Five Point Nine Percent Senior Notes Due Two Thousand Sixteen [Member]
Debt instrument interest rate, stated percentage	5.90%
Seven Point Four Five Percent Senior Debentures Due Two Thousand Sixteen [Member]
Debt instrument interest rate, stated percentage	7.45%
8.5% Senior Debentures Due 2019 [Member]
Short-term Debt	$ 36	0
Debt instrument interest rate, stated percentage	8.50%
Capital Lease and Current Portion of Other Long-Term Obligations
Short-term Debt	$ 7	22
Short-term Debt [Member]
Short-term Debt	$ 43	$ 22