Income Taxes (Details) $ in Millions		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign		$ 4,300
Income/(Loss) before income taxes (in millions)
Income/(Loss) before income taxes		17,780	$ (1,116)	$ (640)
Current Federal Tax Expense (Benefit)		102	(23)	(101)
Current
Non-U.S.		598	554	738
State and local		26	(45)	33
Total current		726	486	670
Deferred
Federal		2,290	(523)	(1,190)
Non-U.S.		(3,254)	168	(70)
State and local		108	29	(134)
Total deferred		(856)	(326)	(1,394)
Provision for/(Benefit from) income taxes (Note 7)		$ (130)	$ 160	$ (724)
Reconciliation of effective tax rate
U.S. statutory rate		21.00%	21.00%	21.00%	35.00%
Non-U.S. tax rates under U.S. rates		1.30%	(2.60%)	46.90%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent		0.50%	8.90%	12.40%
General business credits		(2.30%)	35.10%	67.00%
Effective Income Tax Rate Reconciliation, Disposition of Business, Percent		(18.80%)	(0.40%)	45.50%
Effective Income Tax Rate Reconciliation Foreign Operations Taxed In United States		2.40%	27.00%	(49.20%)
Prior year settlements and claims		(0.30%)	8.30%	(5.00%)
Effective Income Tax Rate Reconciliation, Export Incentives, Percent		(0.60%)	(6.00%)	20.70%
Enacted change in tax laws		1.10%	1.50%	(12.50%)
Valuation allowances		(4.70%)	(108.80%)	(18.70%)
Other		(0.30%)	1.70%	(15.00%)
Effective rate		(0.70%)	(14.30%)	113.10%
Future Effective Federal Income Tax Rate, Percent	0.21
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)				$ 95
Undistributed Foreign Earnings, Deferred Taxes Not Provided		$ 16,700
Deferred tax assets
Employee benefit plans		2,320	$ 4,760
Deferred Tax Assets, Operating Loss Carryforwards		4,163	1,584
Net operating loss carryforwards		4,163	1,584
Tax credit carryforwards		10,437	11,037
Research expenditures		1,117	1,321
Dealer and dealers’ customer allowances and claims		1,944	2,145
Other foreign deferred tax assets		2,005	729
All other		2,353	2,335
Total gross deferred tax assets		24,339	23,911
Less: Valuation allowances		(1,067)	(1,981)
Total net deferred tax assets		23,272	21,930
Deferred tax liabilities
Leasing transactions		2,103	3,299
Depreciation and amortization (excluding leasing transactions)		2,881	3,218
Finance receivables		756	574
Deferred Tax Liabilities, Investments		2,149	144
Other foreign deferred tax liabilities		893	839
All other		2,275	1,971
Total deferred tax liabilities		11,057	10,045
Net deferred tax assets/(liabilities)		23,272	21,930
Deferred Tax Assets, Valuation Allowance		1,067	1,981
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		918
Operating Loss Carryforwards		11,400
Tax Credit Carryforwards		10,400
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance		1,913	1,943
Increase – tax positions in prior periods		1,054	137
Increase – tax positions in current period		25	25
Decrease – tax positions in prior periods		(54)	(131)
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities		1
Settlements			(61)
Lapse of statute of limitations		(7)	0
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation		(22)	0
Ending balance		2,910	1,913	1,943
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		2,900	1,900
Unrecognized Tax Benefits, Interest on Income Taxes Expense		7	(2)	(29)
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		32	36
Income Taxes Paid, Net		$ 568	421	599
Tax Credit Carryforward Remaining Carryforward Period		5 years
Deferred Tax Assets, Net		$ 12,215	11,885
Change in Deferred Tax Not Recognized, Undistributed Earnings of Foreign Subsidiaries, Due to Restructuring		2,900
UNITED STATES
Income/(Loss) before income taxes (in millions)
Income/(Loss) before income taxes		10,043	(231)	2,656
Non-US
Income/(Loss) before income taxes (in millions)
Income/(Loss) before income taxes		7,737	(885)	$ (3,296)
Deferred tax liabilities
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			$ (1,300)
OperatingLossCarryforwardNotSubjectToExpiration [Member]
Deferred tax liabilities
Operating Loss Carryforwards		$ 3,200