Interest Rate Swap Arrangements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Notional Amount Of Derivatives	$ 6,870.0		$ 6,870.0		$ 3,740.0
Change in fair value of cash flow hedges, net of tax	(28.7)	$ 0.0	(5.7)	$ 0.0
Senior Notes 1.30% Due 2017 [Member] | Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Notional Amount Of Derivatives	$ 900.0		$ 900.0
Interest Rate Swap, Spread above One-month LIBOR	0.6616%		0.6616%
Interest Rate Swap, Variable Rate at Period End	0.8586%		0.8586%
Interest Rate Swap, Fixed Rate	1.30%		1.30%
Senior Notes 4.70% Due 2020 [Member] | Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Notional Amount Of Derivatives	$ 300.0		$ 300.0
Interest Rate Swap, Spread above One-month LIBOR	3.156%		3.156%
Interest Rate Swap, Variable Rate at Period End	3.353%		3.353%
Interest Rate Swap, Fixed Rate	4.70%		4.70%
Senior Notes 4.50% Due 2021 [Member] | Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Notional Amount Of Derivatives	$ 1,000.0		$ 1,000.0
Interest Rate Swap, Spread above One-month LIBOR	2.868%		2.868%
Interest Rate Swap, Variable Rate at Period End	3.065%		3.065%
Interest Rate Swap, Fixed Rate	4.50%		4.50%
Senior Notes 3.60% Due 2021 [Member] | Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Notional Amount Of Derivatives	$ 1,100.0		$ 1,100.0
Interest Rate Swap, Spread above One-month LIBOR	1.937%		1.937%
Interest Rate Swap, Variable Rate at Period End	2.1436%		2.1436%
Interest Rate Swap, Fixed Rate	3.60%		3.60%