Finance Receivables - Impaired (Details) - Financial Services [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable Impaired [Abstract]
Number of Days Past Due After Which Consumer Receivables are Considered Impaired	120 days
Consumer [Member]
Financing Receivable Impaired [Abstract]
Impaired Financing Receivable, Recorded Investment	$ 373	$ 375
Impaired Financing Receivable Recorded Investment, Percentage of Receivable	0.60%	0.60%
Non-consumer [Member]
Financing Receivable Impaired [Abstract]
Impaired Financing Receivable, Recorded Investment	$ 149	$ 134
Impaired Financing Receivable Recorded Investment, Percentage of Receivable	0.40%	0.40%