Receivables (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Mar. 26, 2010	Oct. 29, 2009
Receivables [Abstract]
Maximum cash received for sale of senior undivided interest in customer receivables			$ 250
Repayment of principal of accounts receivable securitization program		250
Pro forma impact of recently adopted accounting principle - terminated accounts receivable securitization program		250
Uncollected sold receivables	$ 212