Common Stock and Stock-Based Compensation Stockholders Equity (Details) - USD ($) $ in Millions	3 Months Ended						12 Months Ended
	Mar. 31, 2022		Dec. 31, 2021		Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2021		Sep. 09, 2021
Share Repurchases [Line Items]
Treasury Stock, Value, Acquired, Cost Method						$ 36.8
2021-2022 Share Repurchase Program
Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount									$ 250.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 98.1	[1]	$ 98.1	[1]	$ 250.0		$ 98.1	[1]
ASR Program
Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount			$ 125.0				$ 125.0
Treasury Stock, Shares, Acquired							3,300,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	73.1
Accelerated Share Repurchases, Adjustment to Recorded Amount	$ 25.0
2020-2021 Share Repurchase Program
Share Repurchases [Line Items]
Share-based Payment Arrangement, Cash Used to Settle Award						$ 2.9
Treasury Stock [Member]
Share Repurchases [Line Items]
Treasury Stock, Shares, Acquired						1,300,000
Treasury Stock, Value, Acquired, Cost Method						$ 36.8
Treasury Stock [Member] | 2021-2022 Share Repurchase Program
Share Repurchases [Line Items]
Treasury Stock, Shares, Acquired	0		5,155,491		0
Treasury Stock, Value, Acquired, Cost Method	$ 0.0		$ 151.9		$ 0.0
Total Shares Repurchased Under Program	5,155,491
Total Shares Repurchased Under Program, Value	$ 151.9
Treasury Stock [Member] | 2020-2021 Share Repurchase Program
Share Repurchases [Line Items]
Treasury Stock, Shares, Acquired						1,300,000
Treasury Stock, Value, Acquired, Cost Method						$ 36.8

[1] Remaining authorization includes $25.0 million of committed share repurchases under the terms of the ASR. Approximately $73.1 million of the share repurchase program will remain after the completion of the ASR.