Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends per share (in usd per share)	$ 3.53	$ 2.95
Pension and post-retirement liability changes, tax benefit	$ 7.0	$ 24.8
Change in cash flow hedges, tax		$ 2.0

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

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

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