Debt (Details) - USD ($) $ in Millions		3 Months Ended
	Apr. 05, 2017	Mar. 31, 2017	Dec. 31, 2016	Apr. 01, 2016	Mar. 31, 2016	Mar. 01, 2016	Feb. 29, 2016
Long-Term Debt
Less deferred debt issuance costs		$ (11.4)	$ (12.3)
Total debt		3,237.2	3,010.7
Less current portion		375.1	375.2
Total long-term debt		2,862.1	2,635.5
Total debt, Approximate Fair Value		3,292.3	3,062.2
Less short-term debt, Approximate Fair Value		375.3	375.7
Long-term debt, Approximate Fair Value		2,917.0	2,686.5
The “Revolving Credit Facility”
Long-Term Debt
Maximum borrowing capacity						$ 2,000.0	$ 1,500.0
Increases in aggregate commitments						$ 500.0
Borrowings under the Revolving Credit Facility		0.0
Commercial Paper Program
Long-Term Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		1,247.1	1,018.9
Total debt, Approximate Fair Value		$ 1,247.1	$ 1,018.9
Maximum borrowing capacity				$ 2,000.0	$ 1,500.0
Increases in aggregate commitments				$ 500.0
Maximum maturity term		397 days
Average interest rate (as a percent)		1.21%
Senior Notes
Long-Term Debt
Redemption price as a percentage of principal amount		100.00%
1.55% Senior Notes due September 2017
Long-Term Debt
Stated interest rate (as a percent)		1.55%	1.55%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 374.9	$ 374.9
Total debt, Approximate Fair Value		$ 375.1	$ 375.4
2.55% Senior Notes due January 2019
Long-Term Debt
Stated interest rate (as a percent)		2.55%	2.55%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 749.6	$ 749.5
Total debt, Approximate Fair Value		$ 757.5	$ 758.3
3.125% Senior Notes due September 2021
Long-Term Debt
Stated interest rate (as a percent)		3.125%	3.125%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 374.8	$ 374.8
Total debt, Approximate Fair Value		$ 381.8	380.4
4.00% Senior Notes due February 2022
Long-Term Debt
Stated interest rate (as a percent)		4.00%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 499.4	499.4
Total debt, Approximate Fair Value		528.0	523.7
2.20% Senior Notes due April 2020
Long-Term Debt
Stated interest rate (as a percent)	2.20%
Debt instrument, principal amount	$ 400.0
Debt instrument, face amount, net of discount (as a percent)	99.922%
3.20% Senior Notes due April 2024
Long-Term Debt
Stated interest rate (as a percent)	3.20%
Debt instrument, principal amount	$ 350.0
Debt instrument, face amount, net of discount (as a percent)	99.888%
3.20% Senior Notes due April 2024 | On or after February 1, 2024
Long-Term Debt
Redemption price as a percentage of principal amount	100.00%
Notes payable to foreign banks and other debt
Long-Term Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		2.8	5.5
Total debt, Approximate Fair Value		$ 2.8	$ 5.5
2.20% and 3.20% Senior Notes due April, 2020 and 2024, respectively
Long-Term Debt
Redemption price as a percentage of principal amount	100.00%