Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. statutory rate		35.00%	35.00%	35.00%	35.00%
Foreign provision		79.70%	(8.30%)	(5.50%)	(9.30%)
Change in tax position		(459.70%)	0.00%	(28.30%)	0.00%
Other		(19.00%)	1.60%	(3.10%)	0.30%
Effective rate		(364.00%)	28.30%	(1.90%)	26.00%
Tax charge related to change in tax position on foreign taxes	$ 6.3
Change in tax position on foreign taxes reflected as valuation allowance	2.8
Change in tax position on foreign taxes reflected as prior period tax deduction	$ 3.5