Shareholders' Equity Share Repurchase (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Shareholders' Equity [Abstract]
Stock Repurchased and Retired During Period, Shares	1,840
Stock Repurchased and Retired During Period, Value	$ 99.9
Cumulative shares repurchased under share repurchase program	18,810
Cumulative treasury stock, retired, cost method, amount	$ 540.9
Remaining authorized share repurchase capacity	959.1
Stock Repurchase Program, Authorized Amount	$ 1,500.0	$ 1,000.0