Treasury Stock Transactions (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Treasury Stock, Value [Abstract]
Number of Treasury Shares Repurchased		1,164,800	0	4,243,400	0
Cost of Shares Repurchased	[1]	$ 42.6	$ 0.0	$ 137.5	$ 0.0
Commissions Paid on Stock Repurchases				$ 0.1

[1] Includes a de minimis amount and $0.1 million of commissions for the three and nine months ended September 30, 2022.