Fair Value Measurements (Details 1) - USD ($) $ in Millions	1 Months Ended
	Feb. 28, 2021	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Notes payable, carrying value		$ 7,271.1	$ 7,426.2
Debt instruments, fair value		8,046.5	8,515.9
3.625% Senior Notes due 2022
Debt Instrument [Line Items]
Notes payable, fair value		1,031.2	1,054.1
Notes payable, carrying value		$ 998.8	997.9
Senior notes interest rate		3.625%
4.050% Senior Notes due 2025
Debt Instrument [Line Items]
Notes payable, fair value		$ 1,927.7	2,003.1
Notes payable, carrying value		$ 1,742.5	1,741.2
Senior notes interest rate		4.05%
2.250% Senior Notes due May 1, 2030
Debt Instrument [Line Items]
Notes payable, fair value		$ 1,491.7	1,557.2
Notes payable, carrying value		$ 1,491.8	1,491.1
Senior notes interest rate		2.25%
5.200% Senior Notes due 2045
Debt Instrument [Line Items]
Notes payable, fair value		$ 1,468.2	2,365.1
Notes payable, carrying value		$ 1,099.8	1,723.4
Senior notes interest rate		5.20%
Long Term Debt, Exchanged, Amount	$ 624.6
3.150% Senior Notes due May 1, 2050
Debt Instrument [Line Items]
Notes payable, fair value		$ 1,443.1	1,536.4
Notes payable, carrying value		$ 1,473.0	1,472.6
Senior notes interest rate		3.15%
3.250% Senior Notes, Due February 15, 2051
Debt Instrument [Line Items]
Notes payable, fair value		$ 684.6	0.0
Notes payable, carrying value		$ 465.2	$ 0.0
Senior notes interest rate		3.25%
Long Term Debt, Exchanged, Amount	$ 700.7