Long-term Customer Financing And Sales Of Receivables (Credit Quality Of Customer Financing Receivables And Allowance For Credit Losses) (Details) (USD $) In Millions, unless otherwise specified	Jun. 28, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Total Long-term Receivable	$ 37	$ 27
Current Billed Due	1	10
Past Due Under 90 Days	2	2
Past Due Over 90 Days	12	10
Municipal Leases Secured Tax Exempt [Member]
Debt Instrument [Line Items]
Total Long-term Receivable	1	1
Current Billed Due	0	0
Past Due Under 90 Days	0	0
Past Due Over 90 Days	0	0
Commercial Loans And Leases Secured [Member]
Debt Instrument [Line Items]
Total Long-term Receivable	36	26
Current Billed Due	1	10
Past Due Under 90 Days	2	2
Past Due Over 90 Days	$ 12	$ 10