Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts
Change in the Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Period		$ 85.6	$ 48.2	$ 43.0
Charged to Costs and Expenses	[1]	15.5	58.4	21.4
Charged to Other Accounts	[2]	19.8	0.0	0.0
Deductions and Adjustments	[3]	(3.5)	(21.0)	(16.2)
Balance at End of Period		117.4	85.6	48.2
Valuation allowance for deferred tax assets
Change in the Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Period		172.7	133.8	119.9
Charged to Costs and Expenses	[1]	258.7	38.9	13.9
Charged to Other Accounts	[2]	4.4	0.0	0.0
Deductions and Adjustments	[3]	(5.8)	0.0	0.0
Balance at End of Period		$ 430.0	$ 172.7	$ 133.8

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmI1ZTIwOWQxNThmMzQyZDZhYzI0MjdjZjlkMjliYmFifFRleHRTZWxlY3Rpb246QkFDNDVDNzdFNjYwREUyOTEzRTAwMEY5MEEwRUU2MDMM}

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

[3] “Deductions and adjustments” includes write-offs, net of recoveries, and reductions in the allowances credited to expense.