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. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Long-Term Customer Financing And Sales Of Receivables [Abstract]
Accounts receivable sales proceeds	$ 2	$ 0	$ 7	$ 1
Long-term receivables sales proceeds	62	17	129	23
Total proceeds from one-time sales	$ 64	$ 17	$ 136	$ 24