Schedule II - Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of Beginning of Period	$ 380.8	$ 383.6	$ 444.0
Additions	88.4	45.6	35.9
Retirements	(53.3)	(41.6)	(74.2)
Other Changes	17.1	(6.8)	(22.1)
Balance as of End of Period	433.0	380.8	383.6
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of Beginning of Period	36.0	33.2	41.8
Additions	7.0	14.3	11.4
Retirements	(9.8)	(10.9)	(17.5)
Other Changes	2.1	(0.6)	(2.5)
Balance as of End of Period	35.3	36.0	33.2
Allowance for deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of Beginning of Period	344.8	350.4	402.2
Additions	81.4	31.3	24.5
Retirements	(43.5)	(30.7)	(56.7)
Other Changes	15.0	(6.2)	(19.6)
Balance as of End of Period	$ 397.7	$ 344.8	$ 350.4