Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Contingency [Line Items]
Document Period End Date	Mar. 31, 2020
Tax expense from discrete items	$ (42.2)	$ 1.4
Unrecognized Tax Benefits/Expense, Probability Threshold of Realizing for Tax Benefits/Expense Recognition, Minimum Percentage	50.00%
Effective income tax rate reconciliation CARES Act	$ (33.8)
Effective Income Tax Rate Reconciliation, Uncertain Tax Position	(9.7)
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount	1.0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	0.3
noncash tax benefit from CARES Act	9.9
Liability for Uncertainty in Income Taxes, Noncurrent	11.0		$ 21.0
Tax Year 2014 [Member]
Income Tax Contingency [Line Items]
Proceeds from Income Tax Refunds	16.0
Tax Year 2013 [Member]
Income Tax Contingency [Line Items]
Proceeds from Income Tax Refunds	$ 18.0