Debt (Details) € in Millions, £ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2022 EUR (€)	Mar. 31, 2022 GBP (£)	Dec. 31, 2021 USD ($)
Short-Term Borrowings [Abstract]
Short-term debt	$ 12.4			$ 9.6
Long-Term Debt [Abstract]
Long-term debt, carrying amount	5,685.9			5,727.0
Unamortized discount	(10.2)			(10.8)
Unamortized debt issuance costs	(30.4)			(31.8)
Unamortized deferred gain from settlement of interest rate swaps	1.1			1.3
Long-term debt	5,646.4			5,685.7
Credit Facility [Member]
Credit Facilities [Abstract]
Credit Facilities, maximum borrowing capacity	$ 2,500.0
Credit Facilities, expiration date	Feb. 14, 2025
Credit Facilities, amount outstanding	$ 0.0
Credit Facilities, covenant terms	The Credit Facility contains a financial covenant that requires us to maintain a Leverage Ratio of consolidated indebtedness to consolidated EBITDA (earnings before interest, taxes, depreciation, amortization and non-cash charges) of no more than 3.0 times for the most recently ended 12-month period.
Credit Facilities, covenant compliance	At March 31, 2022, we were in compliance with this covenant as our Leverage Ratio was 2.4 times.
Uncommitted credit lines [Member]
Credit Facilities [Abstract]
Credit Facilities, maximum borrowing capacity	$ 807.5
Credit Facilities, amount outstanding	0.0
Commercial Paper [Member]
Credit Facilities [Abstract]
Credit Facilities, maximum borrowing capacity	2,000.0
Credit Facilities, amount outstanding	0.0
Euro Commercial Paper [Member]
Credit Facilities [Abstract]
Credit Facilities, maximum borrowing capacity	500.0
Credit Facilities, amount outstanding	0.0
3.65% Senior Notes due 2024
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 750.0			750.0
Long-term debt, interest rate	3.65%	3.65%	3.65%
3.60% Senior Notes due 2026
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 1,400.0			1,400.0
Long-term debt, interest rate	3.60%	3.60%	3.60%
€500 million 0.80% Senior Notes due 2027
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 554.7	€ 500.0		568.6
Long-term debt, interest rate	0.80%	0.80%	0.80%
2.45% Senior Notes due 2030
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 600.0			600.0
Long-term debt, interest rate	2.45%	2.45%	2.45%
4.20% Senior Notes due 2030
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 600.0			600.0
Long-term debt, interest rate	4.20%	4.20%	4.20%
€500 million 1.40% Senior Notes due 2031
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 554.7	€ 500.0		568.6
Long-term debt, interest rate	1.40%	1.40%	1.40%
2.60% Senior Notes due 2031
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 800.0			800.0
Long-term debt, interest rate	2.60%	2.60%	2.60%
£325 million 2.25% Senior Notes due 2033
Long-Term Debt [Abstract]
Long-term debt, carrying amount	$ 426.5		£ 325.0	$ 439.8
Long-term debt, interest rate	2.25%	2.25%	2.25%