Long-term Financing and Sales of Receivables - Credit Quality of Financing Receivables and Allowance for Credit Losses (Details) - USD ($) $ in Millions	Jul. 01, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Long-term Receivable	$ 48	$ 63
Current Billed Due	1	0
Past Due Over 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2	2
Municipal leases secured tax exempt
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Long-term Receivable	21	20
Current Billed Due	1	0
Municipal leases secured tax exempt | Past Due Over 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2	0
Commercial loans and leases secured
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Long-term Receivable	27	43
Current Billed Due	0	0
Commercial loans and leases secured | Past Due Over 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 0	$ 2