Equity, Stock Repurchase (Details) - USD ($) shares in Millions, $ in Millions			1 Months Ended	12 Months Ended
	Apr. 27, 2021	Apr. 24, 2018	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Shareholders' Equity
Treasury stock retired (in dollars)				$ 0.0	$ 0.0	$ 0.0
Treasury stock, shares				1.6	2.0
Payments for shares repurchased and retained in treasury (in dollars)				$ 661.7	$ 641.3	$ 601.7
2021 Stock Repurchase Program
Shareholders' Equity
Value of shares authorized to be repurchased (in dollars)	$ 2,000.0
Repurchase of stock program, period	3 years
Number of shares repurchased				6.2
Payments for shares repurchased (in dollars)				$ 457.9
Number of shares repurchased and retained in treasury				0.4
Payments for shares repurchased and retained in treasury (in dollars)				$ 33.0
Number of shares repurchased and retired				5.8
Payments for shares repurchased and retired (in dollars)				$ 424.9
2018 Stock Repurchase Program
Shareholders' Equity
Value of shares authorized to be repurchased (in dollars)		$ 2,000.0
Repurchase of stock program, period		3 years
Number of shares repurchased				3.1	12.0	13.1
Payments for shares repurchased (in dollars)				$ 203.8	$ 641.3	$ 601.7
Number of shares repurchased and retained in treasury				0.3	2.7	2.0
Payments for shares repurchased and retained in treasury (in dollars)				$ 19.8	$ 153.9	$ 87.6
Number of shares repurchased and retired				2.8	9.3	11.1
Payments for shares repurchased and retired (in dollars)				$ 184.0	$ 487.4	$ 514.1
Subsequent Event | 2021 Stock Repurchase Program
Shareholders' Equity
Number of shares repurchased and retained in treasury			0.6
Payments for shares repurchased and retained in treasury (in dollars)			$ 50.0
Value of shares remaining that may be repurchased under the stock repurchase program (in dollars)			$ 1,492.1