Summary of Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Average Turnover Period of Trade Receivables	30 days
Foreign Currency [Abstract]
Foreign Currency Transaction Gain (Loss), before Tax	$ 307,000,000	$ (524,000,000)	$ (510,000,000)
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Net	198,000,000	124,000,000
Impairment of Intangible Assets (Excluding Goodwill)	0	0
Long-Lived Asset Impairment [Abstract]
Impairment of Long-Lived Assets Held-for-use	0	0
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Goodwill	50,000,000	6,000,000
Goodwill, Impairment Loss	$ 0	0
Fair Value Disclosures [Abstract]
Term At Which Fair Value of Finance Receivables is Measured	120 days
Revenue Recognition [Abstract]
Average Term Deferred Revenue Is Recognized	1 year
Selected Other Costs [Abstract]
Engineering, research, and development	$ 7,300,000,000	6,700,000,000	6,700,000,000
Advertising	4,300,000,000	4,300,000,000	4,300,000,000
Affiliated Entity [Member] | Operating Segments [Member] | Financial Services
Finance and Lease Incentives [Abstract]
Earned Interest Supplements And Residual Support Revenue	1,600,000,000	1,300,000,000	1,400,000,000
Amount of Reduction in Depreciation Expense On Property Subject To Or Held For Lease	$ 1,900,000,000	$ 1,500,000,000	$ 1,300,000,000