Debt (Details) - USD ($) $ in Millions					3 Months Ended
	Apr. 03, 2020	Apr. 01, 2020	Mar. 23, 2020	Feb. 19, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Short-Term Borrowings [Abstract]
Short-term debt					$ 10.9		$ 10.1
Long-Term Debt [Abstract]
Long-term debt, carrying amount					5,094.0		5,122.8
Unamortized premium (discount), net					(1.4)		0.8
Unamortized debt issuance costs					(24.2)		(20.0)
Unamortized deferred gain from settlement of interest rate swaps					25.0		30.7
Long-term debt, total					5,093.4		5,134.3
Long-term debt, current portion					0.0		(602.4)
Long-Term Debt					5,093.4		4,531.9
Repayment of debt					600.0	$ 0.0
Proceeds from borrowings					594.0	$ 0.0
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 and the 364 Day Credit Facility contain a financial covenant that requires us to maintain a Leverage Ratio of consolidated indebtedness to consolidated EBITDA of no more than 3.5 times for the most recently ended 12-month period (EBITDA is defined as earnings before interest, taxes, depreciation, amortization and non-cash charges).
Credit Facilities, covenant compliance					at March 31, 2020, we were in compliance with this covenant as our Leverage Ratio was 2.1 times.
Commercial Paper [Member]
Credit Facilities [Abstract]
Credit Facilities, current borrowing capacity					$ 2,000.0
Credit Facilities, amount outstanding					0.0
Uncommitted credit lines [Member]
Credit Facilities [Abstract]
Credit Facilities, current borrowing capacity					1,100.0
Credit Facilities, amount outstanding					0.0
364 Day Credit Facility [Member] | Subsequent Event [Member]
Credit Facilities [Abstract]
Credit Facilities, maximum borrowing capacity	$ 400.0
Credit Facilities, expiration date	Apr. 02, 2021
4.45% Senior Notes due 2020
Long-Term Debt [Abstract]
Long-term debt, carrying amount					$ 0.0		600.0
Long-term debt, interest rate					4.45%
Extinguishment of Debt, Amount			$ 600.0
Gain (Loss) on Extinguishment of Debt			$ 7.7
3.625% Senior Notes due 2022
Long-Term Debt [Abstract]
Long-term debt, carrying amount					$ 1,250.0		1,250.0
Long-term debt, interest rate					3.625%
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%
3.60% 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%
0.80% Euro Notes due 2027
Long-Term Debt [Abstract]
Long-term debt, carrying amount					$ 547.0		561.4
Long-term debt, interest rate					0.80%
2.45% Senior Notes due 2030
Long-Term Debt [Abstract]
Long-term debt, carrying amount				$ 600.0	$ 600.0		0.0
Long-term debt, interest rate				2.45%	2.45%
Long-term debt, maturity date				Apr. 30, 2030
Proceeds from borrowings				$ 592.6
1.40% Euro Notes due 2031
Long-Term Debt [Abstract]
Long-term debt, carrying amount					$ 547.0		$ 561.4
Long-term debt, interest rate					1.40%
4.20% Senior Notes due 2030 | Subsequent Event [Member]
Long-Term Debt [Abstract]
Long-term debt, carrying amount		$ 600.0
Long-term debt, interest rate		4.20%
Long-term debt, maturity date		Jun. 01, 2030
Proceeds from borrowings		$ 592.5