Debt (Details) € in Millions, $ in Millions				12 Months Ended
	Aug. 01, 2019 USD ($)	Jul. 15, 2019 USD ($)	Jul. 08, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 USD ($)	Jul. 08, 2019 EUR (€)
Short-Term Borrowings [Abstract]
Short-term debt					$ 8.1			$ 10.1
Short-term borrowings, weighted average interest rate					4.20%		2.50%	2.50%
Long-Term Debt [Abstract]
Long-term debt, carrying amount					$ 4,900.0			$ 5,122.8
Unamortized premium (discount), net					4.9			0.8
Unamortized debt issuance costs					(16.4)			(20.0)
Unamortized deferred gain from settlement of interest rate swaps					48.0			30.7
Fair value of interest rate swaps					(52.8)			0.0
Long-term debt, total					4,883.7			5,134.3
Long-term debt, current portion					(499.6)			(602.4)
Long-Term Debt					4,384.1			4,531.9
Repayments of Long-term Debt				$ 900.0	0.0	$ 0.0
Proceeds from borrowings			$ 1,100.0	1,112.4	0.0	0.0
Contractual Maturities of Long-Term Debt [Abstract]
Contractual maturities of long-term debt, 2020								600.0
Contractual maturities of long-term debt, 2021								0.0
Contractual maturities of long-term debt, 2022								1,250.0
Contractual maturities of long-term debt, 2023								0.0
Contractual maturities of long-term debt, 2024								750.0
Contractual maturities of long-term debt, Thereafter								2,522.8
Contractual maturities of long-term debt								5,122.8
Components of Interest Expense [Abstract]
Interest expense, Long-term debt				194.6	201.6	201.6
Interest expense, Commercial paper				6.5	9.6	12.5
Interest expense, Interest rate swaps				6.1	5.2	(7.2)
Interest expense, Amortization of deferred gain on interest rate swaps				(14.8)	(12.9)	(12.9)
Interest expense, Fees				4.7	5.6	5.6
Interest expense, Pension and other interest				47.2	57.3	49.0
Interest expense, total				$ 244.3	266.4	$ 248.6
Interest Rate Swaps on 2024 Notes and 2026 Notes [Member]
Long-Term Debt [Abstract]
Unamortized deferred gain from settlement of interest rate swaps	$ (3.3)
Interest Rate Swaps on 2024 Notes [Member]
Long-Term Debt [Abstract]
Interest rate swaps, notional amount	750.0
Interest rate swaps, liability, at fair value					21.8
Interest Rate Swaps on 2026 Notes [Member]
Long-Term Debt [Abstract]
Interest rate swaps, notional amount	500.0
Interest rate swaps, liability, at fair value					31.0
Revolving Credit Facility [Member]
Credit Facilities [Abstract]
Credit Facilities, maximum borrowing capacity								2,500.0
Credit Facilities, expiration date				Jul. 31, 2021
Credit Facilities, covenant terms				The Credit Facility contains financial covenants that require us to maintain a Leverage Ratio of consolidated indebtedness to consolidated EBITDA of no more than 3 times for the most recently ended 12-month period (EBITDA is defined as earnings before interest, taxes, depreciation and amortization) and an Interest Coverage Ratio of consolidated EBITDA to interest expense of at least 5 times for the most recently ended 12-month period.
Credit Facilities, covenant compliance				At December 31, 2019 we were in compliance with these covenants as our Leverage Ratio was 2.2 times and our Interest Coverage Ratio was 10.4 times.
Commercial Paper [Member]
Credit Facilities [Abstract]
Credit Facilities, current borrowing capacity								2,000.0
Credit Facilities, amount outstanding								0.0
Uncommitted lines of credit [Member]
Credit Facilities [Abstract]
Credit Facilities, current borrowing capacity								1,300.0
6.25% Senior Notes due 2019
Long-Term Debt [Abstract]
Long-term debt, carrying amount					500.0			$ 0.0
Long-term debt, interest rate							6.25%	6.25%
Repayments of Long-term Debt		$ 500.0
4.45% Senior Notes due 2020
Long-Term Debt [Abstract]
Long-term debt, carrying amount					1,000.0			$ 600.0
Long-term debt, current portion								$ (600.0)
Long-term debt, interest rate							4.45%	4.45%
Extinguishment of Debt, Amount	400.0
Gain (Loss) on Extinguishment of Debt	$ 6.3
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%	3.625%
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%	3.65%
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%
€500 Million 0.80% Senior Notes due 2027
Long-Term Debt [Abstract]
Long-term debt, carrying amount					0.0		€ 500.0	$ 561.4	€ 500.0
Long-term debt, interest rate							0.80%	0.80%	0.80%
Long-term debt, maturity date			Jul. 08, 2027
€500 Million 1.40% Senior Notes due 2031
Long-Term Debt [Abstract]
Long-term debt, carrying amount					$ 0.0		€ 500.0	$ 561.4	€ 500.0
Long-term debt, interest rate							1.40%	1.40%	1.40%
Long-term debt, maturity date			Jul. 08, 2031