Long-term Customer Financing And Sales Of Receivables (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 29, 2012 D	Dec. 31, 2011
Debt Instrument [Line Items]
Commitments to provide long-term financing	$ 100	$ 138
Allowance for uncollectable accounts, current	50	45
Allowance for uncollectable accounts, non-current	1	10
Long-term receivables	43	37
Servicing obligations for long-term receivables	349	263
Recourse obligation for sold account receivables	200
Fair value of recourse obligation	0
Receivables with past due balances greater than period reviewed for collectability, in days	90
Network Business [Member]
Debt Instrument [Line Items]
Allowance for uncollectable accounts		10
Sale Of NSN [Member]
Debt Instrument [Line Items]
Funded portion of the financing arrangements related to the Networks segment	51
Allowance for uncollectable accounts, current	9
Allowance for uncollectable accounts, non-current	1
Long-term receivables	$ 43