Income Taxes - Schedule Of Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory rate			35.00%	35.00%	35.00%
Foreign provision (as a percent)			(6.20%)	(5.10%)	(13.70%)
Change in U.S. statutory rate (as a percent)			293.10%	0.00%	0.00%
Mandatory U.S. repatriation (as a percent)			(39.70%)	0.00%	0.00%
Change in tax position (as a percent)			(31.10%)	0.00%	0.00%
Goodwill impairment (as a percent)			0.00%	(16.80%)	0.00%
Other (as a percent)			(3.60%)	0.20%	(0.10%)
Effective rate			247.50%	13.30%	21.20%
Net deferred tax benefit due to U.S. tax law changes		$ 51.6
Deferred tax benefit due to remeasurement of deferred taxes		59.7
Deferred tax charge due to mandatory repatriation on non-U.S. earnings		$ 8.1
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