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Fair Value Measurements (Narrative) (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2013
USD ($)
Jun. 28, 2013
USD ($)
Jun. 29, 2012
USD ($)
Jun. 28, 2013
USD ($)
Jun. 29, 2012
USD ($)
Jun. 28, 2013
Japanese Yen
JPY (¥)
Jan. 31, 2013
Japanese Yen
JPY (¥)
Fair Value Measurements [Line Items]              
Japanese currency swap instruments bought, monthly basis (Japanese Yen)           ¥ 92,000,000 ¥ 184,000,000
Exchange rate of Japanese yen per United States dollar (US Dollars per Japanese Yen)           102.25  
Notional amount of currency agreement terminated             6,000,000,000
Payments for termination of currency swap 10,000,000            
Aggregate purchase commitment   55,000,000   55,000,000   5,400,000,000 11,900,000,000
Pre-tax (income) charge related to changes in the fair value of currency swap   $ (3,000,000) $ 6,000,000 $ (11,000,000) $ (8,000,000)