Revenue (Schedule of New Accounting Pronouncements) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue [Abstract]
Net sales	$ 2,321.0	$ 2,313.4	$ 2,232.4	$ 1,900.5	$ 1,851.6	$ 1,877.9	$ 1,763.0	$ 1,773.2	$ 8,767.3	$ 7,265.7	$ 7,523.9
Cost of merchandise sold									7,078.1	5,896.2	$ 6,094.9
Merchandise inventory	808.4				588.5				808.4	588.5
Other current assets	54.8				56.6				54.8	56.6
Other non-current liabilities	8.8				4.7				8.8	4.7
Retained Earnings	$ 850.3				$ 725.1				$ 850.3	$ 725.1