Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. statutory rate		21.00%	35.00%	21.00%	35.00%
Foreign provision		(18.50%)	(241.50%)	(19.10%)	2.80%
Change in tax position		0.00%	0.00%	0.00%	(29.30%)
Other		0.50%	1.60%	0.90%	(3.30%)
Effective rate		3.00%	(204.90%)	2.80%	5.20%
Tax charge related to change in tax position on foreign taxes	$ 6.3

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign tax credit.

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