Debt and Credit Agreements Line of Credit Facility (Details) (USD $)	Mar. 30, 2012
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
Line of credit facility, amount outstanding	$ 0