Revenue (Disaggregation of Revenue by Geographical Area) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 6,772.8	$ 5,740.6	$ 20,318.5	$ 17,099.8
U.S.
Disaggregation of Revenue [Line Items]
Revenue	3,989.6	3,161.4	11,635.1	9,631.4
Europe
Disaggregation of Revenue [Line Items]
Revenue	1,098.6	1,046.7	3,629.6	2,984.4
Japan
Disaggregation of Revenue [Line Items]
Revenue	595.0	660.1	1,832.2	1,919.1
China
Disaggregation of Revenue [Line Items]
Revenue	400.3	289.1	1,285.0	796.2
Other foreign countries
Disaggregation of Revenue [Line Items]
Revenue	$ 689.4	$ 583.2	$ 1,936.7	$ 1,768.7