Income Taxes - Tax Reform (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 28, 2018	Jan. 28, 2018	Oct. 28, 2018	Dec. 31, 2017
U.S. Tax Reform
Corporate federal statutory tax rate (as a percent)	21.00%			35.00%
Net provisional income tax expense (benefit)		$ (303.1)
Discrete tax benefit related to the remeasurement of net deferred tax liabilities		(303.9)
Deemed earnings repatriation tax		15.6
Net tax expense (benefit) related to lower income tax rate		$ (14.8)
Deemed repatriation tax payment period		8 years
Forecasted
U.S. Tax Reform
Effective statutory income tax rate (as a percent)			23.30%