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
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired	[1]			$ 12.0
Accounts Receivable, Allowance for Credit Loss, Noncurrent		$ 16.7		22.1		$ 13.2
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period		23.4	[2]	15.5	[2]	10.3
Charges or (Reductions) to Costs and Expenses		4.6		0.0		5.6
Charges or (Reductions) to Other Accounts		(6.8)		12.0	[1]	(0.2)
Deductions		(1.0)		(4.1)		(0.2)
Balance at End of Period	[2]	20.2		23.4		15.5
Valuation Allowance Of Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period		1,530.5	[1]	584.1	[1]	30.6
Charges or (Reductions) to Costs and Expenses		(73.4)		946.4		553.5
Charges or (Reductions) to Other Accounts		0.0		0.0		0.0
Deductions		0.0		0.0		0.0
Balance at End of Period	[1]	$ 1,457.1		$ 1,530.5		$ 584.1

[1] mount relates to allowance of $12.0 million acquired in the Acquisition.

[2] Allowance for doubtful accounts balance includes $16.7 million, $22.1 million, $13.2 million of allowance on long-term receivables recorded in other long term assets for the years ended December 31, 2019, 2018 and 2017, respectively.