Condensed Consolidating Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Cash flows from operating activities:
Net income (loss)	$ (91)	$ 2	$ (4,104)	$ 224
Impairment, restructuring and other costs	20	13	3,445	16
Settlement charges	26	12	65	12
Equity in loss (earnings) of subsidiaries	0	0	0	0
Dividends received from subsidiaries			0	0
Depreciation and amortization			722	725
Gains on sale of real estate	(3)	(17)	(20)	(67)
Increase (Decrease) in Other Operating Assets and Liabilities, Net			136	(738)
Net cash provided (used) by operating activities			244	172
Cash flows from investing activities:
Purchase of property and equipment and capitalized software, net of dispositions			(347)	(739)
Other, net			33	10
Net cash used by investing activities			(314)	(729)
Cash flows from financing activities:
Debt issued, net of debt issuance costs			2,678
Debt repaid			(1,508)	(45)
Dividends paid			(117)	(349)
Issuance of common stock				5
Intercompany activity, net			0	0
Other, net			(90)	49
Net cash provided (used) by financing activities			963	(340)
Net increase (decrease) in cash, cash equivalents and restricted cash			893	(897)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, beginning of period			731	1,248
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, end of period	1,624	351	1,624	351
Parent
Cash flows from operating activities:
Net income (loss)	(91)	2	(4,104)	224
Impairment, restructuring and other costs	0	0	0	0
Settlement charges	0	0	0	0
Equity in loss (earnings) of subsidiaries	53	3	4,041	(212)
Dividends received from subsidiaries			608	819
Depreciation and amortization			0	0
Gains on sale of real estate	0	0	0	0
Increase (Decrease) in Other Operating Assets and Liabilities, Net			(750)	(99)
Net cash provided (used) by operating activities			(205)	732
Cash flows from investing activities:
Purchase of property and equipment and capitalized software, net of dispositions			0	0
Other, net			0	0
Net cash used by investing activities			0	0
Cash flows from financing activities:
Debt issued, net of debt issuance costs			1,238
Debt repaid			0	0
Dividends paid			(117)	(349)
Issuance of common stock				5
Intercompany activity, net			(641)	(1,161)
Other, net			(63)	(74)
Net cash provided (used) by financing activities			417	(1,579)
Net increase (decrease) in cash, cash equivalents and restricted cash			212	(847)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, beginning of period			413	889
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, end of period	625	42	625	42
Subsidiary Issuer
Cash flows from operating activities:
Net income (loss)	(230)	(213)	(4,478)	(422)
Impairment, restructuring and other costs	5	1	2,811	1
Settlement charges	12	0	26	0
Equity in loss (earnings) of subsidiaries	92	125	1,360	264
Dividends received from subsidiaries			300	0
Depreciation and amortization			225	251
Gains on sale of real estate	0	(8)	(1)	(32)
Increase (Decrease) in Other Operating Assets and Liabilities, Net			1,058	(139)
Net cash provided (used) by operating activities			1,301	(77)
Cash flows from investing activities:
Purchase of property and equipment and capitalized software, net of dispositions			(63)	(179)
Other, net			(1)	(2)
Net cash used by investing activities			(64)	(181)
Cash flows from financing activities:
Debt issued, net of debt issuance costs			1,492
Debt repaid			(1,506)	(45)
Dividends paid			0	0
Issuance of common stock				0
Intercompany activity, net			(1,210)	239
Other, net			(15)	73
Net cash provided (used) by financing activities			(1,239)	267
Net increase (decrease) in cash, cash equivalents and restricted cash			(2)	9
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, beginning of period			64	64
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, end of period	62	73	62	73
Other Subsidiaries
Cash flows from operating activities:
Net income (loss)	85	85	(923)	370
Impairment, restructuring and other costs	15	12	634	15
Settlement charges	14	12	39	12
Equity in loss (earnings) of subsidiaries	0	0	0	0
Dividends received from subsidiaries			0	0
Depreciation and amortization			497	474
Gains on sale of real estate	(3)	(9)	(19)	(35)
Increase (Decrease) in Other Operating Assets and Liabilities, Net			(172)	(500)
Net cash provided (used) by operating activities			56	336
Cash flows from investing activities:
Purchase of property and equipment and capitalized software, net of dispositions			(284)	(560)
Other, net			34	12
Net cash used by investing activities			(250)	(548)
Cash flows from financing activities:
Debt issued, net of debt issuance costs			(52)
Debt repaid			(2)	0
Dividends paid			(908)	(819)
Issuance of common stock				0
Intercompany activity, net			1,851	922
Other, net			(12)	50
Net cash provided (used) by financing activities			877	153
Net increase (decrease) in cash, cash equivalents and restricted cash			683	(59)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, beginning of period			254	295
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, end of period	937	236	937	236
Consolidating Adjustments
Cash flows from financing activities:
Debt repaid			0
Consolidating Adjustments
Cash flows from operating activities:
Net income (loss)	145	128	5,401	52
Impairment, restructuring and other costs	0	0	0	0
Settlement charges	0	0	0	0
Equity in loss (earnings) of subsidiaries	(145)	(128)	(5,401)	(52)
Dividends received from subsidiaries			(908)	(819)
Depreciation and amortization			0	0
Gains on sale of real estate	0	0	0	0
Increase (Decrease) in Other Operating Assets and Liabilities, Net			0	0
Net cash provided (used) by operating activities			(908)	(819)
Cash flows from investing activities:
Purchase of property and equipment and capitalized software, net of dispositions			0	0
Other, net			0	0
Net cash used by investing activities			0	0
Cash flows from financing activities:
Debt issued, net of debt issuance costs			0
Debt repaid				0
Dividends paid			908	819
Issuance of common stock				0
Intercompany activity, net			0	0
Other, net			0	0
Net cash provided (used) by financing activities			908	819
Net increase (decrease) in cash, cash equivalents and restricted cash			0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, beginning of period			0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, end of period	$ 0	$ 0	$ 0	$ 0