Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for doubtful accounts
Change in the Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Period		$ 119.6	$ 117.4	$ 85.6
Charged to Costs and Expenses		22.0	54.7	15.5
Charged to Other Accounts	[1]	(2.9)	0.3	19.8
Deductions and Adjustments	[2]	(43.3)	(52.8)	(3.5)
Balance at End of Period		95.4	119.6	117.4
Valuation allowance for deferred tax assets
Change in the Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Period		683.4	430.0	172.7
Charged to Costs and Expenses		187.0	213.8	258.7
Charged to Other Accounts	[1]	(2.1)	(21.3)	4.4
Deductions and Adjustments	[2]	48.6	60.9	(5.8)
Balance at End of Period		$ 916.9	$ 683.4	$ 430.0

[1] “Additions charged to other accounts” includes translation adjustments.

[2] “Deductions and adjustments” includes write-offs, net of recoveries, increases in allowances offset by increases to deferred tax assets, and reductions in the allowances credited to expense.