Acquisitions and Discontinued Operations - Other Discontinued Operations Activity (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other businesses included in discontinued operations \| Discontinued operations, disposed of by sale
Discontinued Operations
Net loss recognized with disposition of business	$ 1.3	$ 3.7	$ 4.4

Amount after tax of an increase (decrease) to a gain (loss) previously reported in discontinued operations in a prior period.

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