Subsequent Events Long-Term Debt (Details) - USD ($) $ in Thousands	Jul. 23, 2015	Jun. 28, 2015	Dec. 31, 2014	Jun. 29, 2014
Subsequent Event [Line Items]
Gross Long-term Debt		$ 6,111,717	$ 4,772,843	$ 4,739,311
Subsequent Event [Member]
Subsequent Event [Line Items]
Gross Long-term Debt	$ 750,000
Senior Unsecured Notes due 2025 [Domain] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.50%
Gross Long-term Debt	$ 450,000
Senior Unsecured Notes due 2045 [Domain] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.625%
Gross Long-term Debt	$ 300,000