Debt (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 29, 2014
Credit Agreement
Credit Agreement
Multi-currency borrowing capacity	$ 500
Term of senior unsecured revolving credit facility	5 years
Potential additional borrowing capacity	500
Sublimit on letters of credit	100
Unused and available credit under the credit agreement	476.4
Stand-by letters of credit outstanding	$ 23.6
Eurocurrency rate loans | LIBOR
Credit Agreement
Variable interest rate basis	LIBOR
Eurocurrency rate loans | LIBOR | Minimum
Credit Agreement
Interest rate added to base rate (as a percent)	0.975%
Eurocurrency rate loans | LIBOR | Maximum
Credit Agreement
Interest rate added to base rate (as a percent)	1.45%
Base rate loans and swing line loans | LIBOR
Credit Agreement
Interest rate added to base rate (as a percent)	1.00%
Variable interest rate basis	LIBOR
Base rate loans and swing line loans | LIBOR | Minimum
Credit Agreement
Interest rate added to base rate (as a percent)	0.00%
Base rate loans and swing line loans | LIBOR | Maximum
Credit Agreement
Interest rate added to base rate (as a percent)	0.45%
Base rate loans and swing line loans | Federal funds
Credit Agreement
Interest rate added to base rate (as a percent)	0.50%
Variable interest rate basis	Federal Funds Rate
Base rate loans and swing line loans | Prime Rate
Credit Agreement
Variable interest rate basis	Prime Rate