Reportable Business Segments and International Operations, Reconciliation of Segment Operating Income to Consolidated Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information
Operating income	$ 2,105.1	$ 1,638.4	$ 1,619.2
Stock-based compensation expense	(83.0)	(70.5)	(63.0)
Acquisition-related expenses	(70.4)	(11.5)	(25.4)
Other operating expenses	(61.1)	(56.2)	(54.6)
Interest expense	(115.5)	(115.4)	(117.6)
Loss on early extinguishment of debt	0.0	0.0	(14.3)
Other income (expense), net	(0.4)	3.6	8.6
Income from continuing operations before income taxes	1,989.2	1,526.6	1,495.9
Operating Segment
Segment Reporting Information
Operating income	$ 2,319.6	$ 1,776.6	$ 1,762.2