Leases (Lease liabilities) (Details) - USD ($) $ in Millions		Feb. 01, 2020		Aug. 03, 2019
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term		5 years 8 months
Weighted Average Discount Rate		26.10%
2020		$ 158.9	[1],[2]	$ 462.0	[3],[4]
2021		350.4	[1],[2]	402.3	[3],[4]
2022		287.6	[1],[2]	325.4	[3],[4]
2023		214.2	[1],[2]	242.7	[3],[4]
2024		151.6	[1],[2]	172.6	[3],[4]
Thereafter		529.0	[1],[2]	563.3	[3],[4]
Operating Leases, Future Minimum Payments Due		1,691.7	[1],[2]	2,168.3	[3],[4]
Operating lease, imputed interest	[1],[2]	(850.0)
Operating Lease, Liability	[1],[2]	841.7
Current portion of lease obligations		(161.8)	[1],[2]	0.0
Long-term lease obligations		679.9	[1],[2]	$ 0.0
Lessee, operating lease, lease not yet commenced, minimum commitments		$ 18.7

[1] Although such amounts are generally non-cancelable, certain leases are cancelable if specified sales levels are not achieved or co-tenancy requirements are not being satisfied. All future minimum rentals under such leases have been included in the above table.

[2] Net of sublease income, which is not expected to be significant in any period.

[3] Although such amounts are generally non-cancelable, certain leases are cancelable if specified sales levels are not achieved or co-tenancy requirements are not being satisfied. All future minimum rentals under such leases have been included in the above table.

[4] Net of sublease income, which is not expected to be significant in any period.