Components of Deferred Tax Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets, Net [Abstract]
Postretirement/post-employment benefits	$ 16.6	$ 16.7
Deferred compensation	106.5	99.5
Pension costs	27.9	23.7
Basis differences in fixed assets	(86.3)	(75.3)
Interest	42.9	45.5
Accruals and reserves	23.9	19.4
Allowance for doubtful accounts	19.7	6.5
Basis differences in intangible assets	(340.0)	(321.0)
Deferred Tax Liabilities, ROU	(285.8)	(335.2)
Deferred Tax Liabilities, Leasing Arrangements	350.4	361.4
Tax loss/tax credit carry forwards	343.0	297.1
Prepaid expenses	(7.3)	(6.7)
Deferred revenue	(11.6)	(21.7)
Unremitted foreign earnings	(9.3)	(1.3)
Deferred Tax and Other Liabilities, Noncurrent	(740.3)	(761.2)
Other	83.6	44.8
Net deferred tax assets	1,014.5	914.6
Valuation allowance	(197.1)	(164.2)	$ (211.0)	$ (243.0)
Deferred Tax Assets, Net	77.1	(10.8)
Total deferred tax assets, net	817.4	750.4
Foreign Income Tax Expense (Benefit), Continuing Operations	75.8	83.7	$ 102.7
Deferred Tax Assets	302.0	252.1
Deferred income taxes	302.0	252.1
Deferred Tax Liabilities	$ 224.9	$ 262.8