Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity [Abstract]
Common stock cash dividends (in usd per share)	$ 0.10	$ 0.10	$ 0.20	$ 0.20
Foreign currency, translation adjustments, tax	$ 0.6	$ 0.2	$ (1.0)	$ (0.6)
Derivatives designated as hedges, tax	(0.5)	(0.5)	(1.1)	(0.6)
Pension and other postretirement liability adjustments, tax	$ 0.4	$ 0.4	$ 0.9	$ 1.0

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

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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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