Debt (Schedule of Debt) (Details) - USD ($) $ in Millions		Feb. 01, 2020	Aug. 03, 2019	Aug. 31, 2015
Debt Instrument [Line Items]
Long-term debt, including unamortized original issue discount and debt issuance costs		$ 1,292.0
Long-term Debt, Current Maturities		(21.5)	$ 0.0
Total long-term debt		1,244.3	1,338.6
Term Loan
Debt Instrument [Line Items]
Long-term debt, including unamortized original issue discount and debt issuance costs		1,292.0	1,371.5	$ 1,800.0
Less: unamortized debt issuance costs	[1]	(12.6)	(15.9)
Less: unamortized original issue discount	[1]	(11.0)	(13.8)
Long-term debt		$ 1,268.4	1,341.8
Debt effective interest rate (percent)		6.30%
Revolving credit facility
Debt Instrument [Line Items]
Long-term debt, including unamortized original issue discount and debt issuance costs		$ 0.0	0.0
Less: unamortized debt issuance costs	[2]	(2.6)	(3.2)
Long-term debt		$ (2.6)	$ (3.2)

[1] The original issue discount and debt issuance costs for the term loan are amortized over the life of the term loan using the interest method based on an imputed interest rate of approximately 6.3%.

[2] The unamortized debt issuance costs are amortized on a straight-line basis over the life of the amended revolving credit agreement.