Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Name:	us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Stockholders' Equity (Details) - USD ($) shares in Millions		12 Months Ended
Stockholders' Equity (Details) - USD ($) shares in Millions	Dec. 09, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Repurchase of common shares		$ 183,300,000	$ 27,900,000	$ 20,000,000.0
Stock repurchase program, term	2 years
Stock repurchase program, authorized amount	$ 350,000,000
Stock repurchase program, remaining authorized amount		335,000,000
Common Stock
Class of Stock [Line Items]
Repurchase of common shares		$ 0	$ 0
Repurchase of common shares (in shares)		1.6	0.8	0.3