Debt and Credit Agreements - Line of Credit Facility (Details) (USD $)	6 Months Ended
	Jun. 28, 2013
Revolving credit facility
Line of Credit Facility
Line of credit facility, current borrowing capacity	$ 1,000,000,000
Line of credit facility, amount outstanding	0
Receivable securitization facility
Line of Credit Facility
Line of credit facility, current borrowing capacity	250,000,000
Expiration period	364 days
Line of credit facility, amount outstanding	$ 0