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Debt - Convertible Senior Notes Due 2021 (Details)		3 Months Ended		12 Months Ended
	Sep. 15, 2015 USD ($) $ / shares	Jan. 29, 2022 USD ($) $ / shares	Oct. 28, 2017 trading_day	Jan. 29, 2022 USD ($) $ / shares	Jan. 30, 2021 USD ($)	Jan. 25, 2020 USD ($)
Debt Instrument [Line Items]
Amortization of debt discount				$ 1,665,000	$ 7,441,000	$ 20,112,000
Debt Instrument Fair Value, Per Stated Incremental Portion on Principal | $ / shares		$ 104.50		$ 104.50
Debt Instrument, Convertible, Carrying Amount of Equity Component		$ 112,600,000		$ 112,600,000
Principal payments on senior credit agreement, including term loans				271,875,000	973,500,000	480,625,000
Loss (gain) on debt extinguishment				62,000	(12,046,000)	76,000
0.75% Convertible Senior Notes Due 2021
Debt Instrument [Line Items]
Debt, interest rate (in percent)	0.75%
Debt instrument, face amount	$ 485,000,000				$ 58,264,000	460,000,000
Debt Conversion, Converted Instrument, Amount	$ 1,000
Debt instrument conversion ratio	10.3211
Debt instrument, convertible, conversion price (per share) | $ / shares	$ 96.89
Convertible debt, trading day threshold | trading_day			20
Convertible debt, consecutive trading day threshold | trading_day			30
Convertible debt, percentage of stock trigger price threshold			130.00%
Debt Instrument, Convertible, Conversion Price, Threshold Trigger Price | $ / shares	$ 125.96
Convertible debt, measurement period for percentage of product sale price of common stock and applicable conversion threshold			98.00%
Convertible debt, comparable yield					5.50%
Amortization of debt discount				$ 1,700,000	$ 7,400,000	20,100,000
Principal payments on senior credit agreement, including term loans		$ 24,300,000			371,400,000
Loss (gain) on debt extinguishment					$ 12,000,000	$ 100,000

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