Leases (Lease Expense and Cash Outflows from Operating and Finance Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finance lease expense:
Depreciation and amortization	$ 66.4	$ 74.8	$ 74.8
Interest expense	26.5	30.8	32.9
Total finance lease expense	92.9	105.6	107.7
Operating lease expense	236.7	249.7	146.2
Short-term lease expense	4.0	5.0	4.6
Variable lease expense	1.9	1.6	1.4
Total lease expense	335.5	361.9	259.9
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	234.2	223.0	121.5
Operating cash outflows from finance leases (interest component)	26.5	30.8	32.9
Financing cash outflows from finance leases (principal component)	62.0	75.7	86.0
Total cash outflows from operating and finance leases	$ 322.7	$ 329.5	$ 240.4