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Convertible Senior Notes - Bond Hedge and Warrant Terminations and Notes Repurchases (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Jul. 30, 2022	Apr. 30, 2022	Jan. 28, 2023	Jan. 29, 2022	Jan. 30, 2021	Sep. 30, 2019	Jun. 30, 2018
Debt Instrument
Repayments of convertible senior notes			$ (13,064,000)	$ (335,729,000)	$ (215,846,000)
(Gain) loss on extinguishment of debt			169,578,000	29,138,000	$ (152,000)
Payments for termination of common stock warrants			390,934,000
Aggregate principal amount of notes derecognized			(261,988,000)
Estimated settlement cost			405,577,000
Cash received for the termination of the bond hedges			231,796,000
Outstanding Amount			$ 2,474,910,000	2,009,785,000
Convertible note bond hedges
Debt Instrument
Aggregate amount received (paid) in cash to terminate warrants or bond hedges		$ 232,000,000
2023 and 2024 Notes \| Convertible note bond hedges
Debt Instrument
Trading days used to determine the conversion value			3 days
2023 and 2024 Notes \| Convertible note bond hedges \| Other expense-net
Debt Instrument
(Gain) loss on extinguishment of debt			$ 4,300,000
2023 Notes
Debt Instrument
Repayments of convertible senior notes			(9,400,000)	(261,000,000)
Debt instrument, principal amount			9,400,000
(Gain) loss on extinguishment of debt				(19,000,000)
2023 Notes \| Convertible note bond hedges
Debt Instrument
Aggregate closing price received			56,000,000
2024 Notes
Debt Instrument
Repayments of convertible senior notes			(3,600,000)	(130,000,000)
Debt instrument, principal amount	$ 350,000,000
(Gain) loss on extinguishment of debt				(10,000,000)
2024 Notes \| Convertible note bond hedges
Debt Instrument
Aggregate closing price received			180,000,000
Private Offering
Debt Instrument
Debt instrument, principal amount							$ 300,000,000
Outstanding Amount			43,600,000	294,028,000
Private Offering \| 2023 Notes
Debt Instrument
Debt instrument, principal amount				335,000,000
Outstanding Amount			1,696,000	74,390,000
Private Offering \| 2024 Notes
Debt Instrument
Debt instrument, principal amount						$ 350,000,000
Outstanding Amount			41,904,000	$ 219,638,000
Private Offering \| Notes Repurchase
Debt Instrument
Trading days used to determine the conversion value		5 days
(Gain) loss on extinguishment of debt		$ 146,000,000
Aggregate notes repurchased and derecognized		180,000,000
Financing liability, fair value		278,000,000
Amortization of debt issuance costs		1,000,000.0
Cash paid to holders		314,000,000
Outstanding Amount		47,000,000
Fair value of the bifurcated embedded equity derivative		267,000,000
Private Offering \| Notes Repurchase \| Other expense-net
Debt Instrument
Gain on the fair value adjustment of the bifurcated embedded equity derivative		11,000,000
Private Offering \| Additional Notes Repurchase
Debt Instrument
Trading days used to determine the conversion value	1 day
(Gain) loss on extinguishment of debt	$ 23,000,000
Aggregate notes repurchased and derecognized	57,000,000
Estimated settlement cost	80,000,000
Financing liability, fair value	55,000,000
Amortization of debt issuance costs	300,000
Cash paid to holders	82,000,000
Outstanding Amount	25,000,000
Fair value of the bifurcated embedded equity derivative	57,000,000
Private Offering \| Additional Notes Repurchase \| Other expense-net
Debt Instrument
Loss on the fair value adjustment of the bifurcated embedded equity derivative	1,500,000
Private Offering \| 2023 Notes \| Notes Repurchase
Debt Instrument
Aggregate notes repurchased and derecognized		45,000,000
Private Offering \| 2023 Notes \| Additional Notes Repurchase
Debt Instrument
Aggregate purchase price	18,000,000
Private Offering \| 2024 Notes \| Notes Repurchase
Debt Instrument
Aggregate purchase price		135,000,000
Private Offering \| 2024 Notes \| Additional Notes Repurchase
Debt Instrument
Aggregate purchase price	39,000,000
Private Offering \| Financing liability \| Notes Repurchase
Debt Instrument
Estimated settlement cost		325,000,000
Private Offering \| Financing liability \| Additional Notes Repurchase
Debt Instrument
Estimated settlement cost	$ 80,000,000
Warrants
Debt Instrument
Aggregate amount received (paid) in cash to terminate warrants or bond hedges		$ (391,000,000)
Warrants \| 2023 and 2024 Notes
Debt Instrument
Outstanding Amount			0
Warrants \| 2023 and 2024 Notes \| Other expense-net
Debt Instrument
Net loss on the fair value adjustment of the warrants			4,200,000
Warrants \| 2023 Notes
Debt Instrument
Aggregate purchase price			184,000,000
Warrants \| 2024 Notes
Debt Instrument
Aggregate purchase price			$ 203,000,000
Warrants \| Common Stock \| Maximum
Debt Instrument
Trading days used to determine the conversion value			3 days
Warrants \| Common Stock \| Minimum
Debt Instrument
Trading days used to determine the conversion value			2 days