Long-term Customer Financing and Sales Of Receivables (Credit Quality Of Customer Financing Receivables And Allowance For Credit Losses) (Details) - USD ($) $ in Millions	Oct. 03, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Long-term Receivable	$ 28	$ 49
Current Billed Due	0	0
Past Due Under 90 Days	1	0
Past Due Over 90 Days	0	12
Municipal leases secured tax exempt
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Long-term Receivable	5	14
Current Billed Due	0	0
Past Due Under 90 Days	0	0
Past Due Over 90 Days	0	0
Commercial loans and leases secured
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Long-term Receivable	23	35
Current Billed Due	0	0
Past Due Under 90 Days	1	0
Past Due Over 90 Days	$ 0	$ 12