Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ / shares in Thousands, $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Common stock cash dividends (in usd per share)	$ 0	$ 0
Foreign currency, translation adjustments, tax	$ (1.6)	$ 0.0
Derivatives designated as hedges, tax	(0.6)	0.0
Pension and other postretirement liability adjustments, tax	$ 0.5	$ 0.0

Aggregate dividends declared during the period for each share of common stock outstanding.

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-SubTopic 10
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Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

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