Financing and Capital Components of Debt (Details) - USD ($) $ in Millions	Sep. 28, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 5,002.5	$ 4,056.2
Current portion of long-term debt	1,824.5	0.0
Long-term debt, net of current maturities	3,178.0	4,056.2
Other
Debt Instrument [Line Items]
Long-term debt	3.4	3.4
Commercial Paper \| U.S. dollar-denominated commercial paper
Debt Instrument [Line Items]
Long-term debt	594.6	665.1
Commercial Paper \| Euro-denominated commercial paper
Debt Instrument [Line Items]
Long-term debt	273.3	282.7
Senior Notes \| 1.80% senior unsecured notes due 2019
Debt Instrument [Line Items]
Long-term debt	$ 299.5	298.9
Interest rate, stated percentage	1.80%
Senior Notes \| 2.35% senior unsecured notes due 2021
Debt Instrument [Line Items]
Long-term debt	$ 746.7	745.9
Interest rate, stated percentage	2.35%
Senior Notes \| 3.15% senior unsecured notes due 2026
Debt Instrument [Line Items]
Long-term debt	$ 891.8	891.0
Interest rate, stated percentage	3.15%
Senior Notes \| 4.30% senior unsecured notes due 2046
Debt Instrument [Line Items]
Long-term debt	$ 546.9	546.8
Interest rate, stated percentage	4.30%
Line of credit \| U.S. dollar variable interest rate term loan due 2019
Debt Instrument [Line Items]
Long-term debt	$ 175.0	500.0
Line of credit \| Delayed-draw term loan due 2019
Debt Instrument [Line Items]
Long-term debt	1,350.0	0.0
Line of credit \| Yen variable interest rate term loan due 2022
Debt Instrument [Line Items]
Long-term debt	$ 121.3	$ 122.4

Contractual interest rate for funds borrowed, under the debt agreement.

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