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		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Long-Term Customer Financing And Sales Of Receivables [Abstract]
Accounts receivable sales proceeds	$ 26	$ 2	$ 33	$ 3
Long-term receivables sales proceeds	52	25	52	52
Total proceeds from receivable sales	$ 78	$ 27	$ 85	$ 55