Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension and postretirement liability adjustment, tax	$ 2.3	$ 1.1	$ 22.2
Dividend per share (in dollars per shares)	$ 1.19	$ 1.13	$ 1.12
Cumulative effect of ASU 2016-13
Income tax expense (benefit), intraperiod tax allocation			$ 0.2

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

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