Long-term Customer Financing And Sales Of Receivables (Proceeds Received From Non-Recourse Sales Of Accounts Receivable And Long-Term Receivables) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Long-Term Customer Financing And Sales Of Receivables [Abstract]
Accounts receivable sales proceeds	$ 7	$ 1
Long-term receivables sales proceeds	2	28
Total proceeds from receivable sales	$ 9	$ 29