Stock-Based Compensation, Stock-based Comp Expense (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Stock-Based Compensation
Expense incurred for stock-based compensation plans	$ 19.7	$ 19.1
Recognized tax benefit related to stock-based compensation	5.8	4.5
Excess tax benefit from option exercises	$ 3.8	$ 2.6

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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