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Shareholders' Equity - Changes in Common Shares (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Stock Outstanding Rollforward [Roll Forward]
Beginning Balance (in shares)	50,970	53,964	53,984
Repurchase of shares (in shares)	0	(3,143)	(139)
Repurchase of shares, at cost		$ 50.5	$ 3.3
Shares issued due to vesting of share-based compensation awards (in shares)	158	61	66
Other shares issued for compensation (in shares)	29	88	53
Ending Balance (in shares)	51,157	50,970	53,964

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References + Details