Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in Unrecognized Tax Benefits
Beginning balance, Unrecognized tax benefits	$ 45.5	$ 46.9	$ 61.6
Additions based on tax positions related to the current year		1.8	1.3
Additions for tax positions of prior years			17.4
Reductions for tax positions related to the current year	(3.3)	(3.2)	(3.2)
Settlements			(14.5)
Expired statute of limitations			(15.7)
Ending balance, Unrecognized tax benefits	42.2	45.5	46.9
Amount of unrecognized tax benefits that would reduce the effective income tax rate, if recognized	1.6
Accumulated pre-tax interest and penalties related to unrecognized tax benefits	$ 1.4	$ 1.2	$ 1.1

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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