Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Percent	12.00%	55.00%	59.00%
Undistributed Earnings of Foreign Subsidiaries and Foreign Corporate Joint Ventures [Member]
Undistributed earnings of foreign subsidiaries	$ 5.1	$ 5.2
Tax Cuts and Jobs Act [Member]
Tax adjustments, settlements, and unusual provisions	$ 30.4

Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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