Long-term Customer Financing And Sales Of Receivables (Narrative) (Details) (USD $) In Millions, unless otherwise specified				3 Months Ended
	Mar. 30, 2013	Dec. 31, 2012	Mar. 30, 2013 Sale Of NSN [Member]	Mar. 30, 2013 Loans and Finance Receivables [Member] D	Mar. 30, 2013 Finacing Receivable, Loan One [Member]
Debt Instrument [Line Items]
Commitments to provide long-term financing	$ 73	$ 84
Long-term receivables	30	60	30
Committed facilities for the sale of accounts receivable or long-term receivables	0	0
Servicing obligations for long-term receivables	379	375
Financing receivables past due over 90 days				$ 7	$ 13
Receivables with past due balances greater than period reviewed for collectability, in days				90