Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue Recognition [Abstract]
Revenue recognition term of separate and bundled services	7 years
Cash Equivalents [Abstract]
Maximum maturity period for highly liquid securities	90 days
Pension and Other Postretirement Plans [Abstract]
Percentage recognized as pension expense in the first year	60.00%
Percentage of pension expense recognized in each of the next four years	10.00%
Subsequent period over which pension expense adjustment is amortized	4 years
Percentage of non-US pension benefit obligations related to Canada, United Kingdom and Germany	93.00%
Income Taxes [Abstract]
Number of years used for valuation allowance methodology	3 years
Minimum threshold to recognize the tax benefit for uncertain tax positions	50.00%
Foreign Currency Transactions and Translation [Abstract]
Foreign currency remeasurement and transaction (gains) losses	$ (17)	$ 203	$ (85)
Automotive Selling, General and Administrative Expense
Advertising and Promotion Expenditures [Abstract]
Advertising and promotion expenditures	3,300	2,700	3,700
Automotive Cost of Sales
Research and Development Expenditures [Abstract]
Research and development expenditures	$ 7,900	$ 6,200	$ 6,800
Automotive Financing | Minimum | Vehicles
Equipment on Operating Leases, net [Abstract]
Term of leasing arrangements	2 years
Automotive Financing | Maximum | Vehicles
Equipment on Operating Leases, net [Abstract]
Term of leasing arrangements	5 years
Automotive Financing | Retail Finance Receivables
Revenue Recognition [Abstract]
Period past due threshold for suspending accrual of finance charge income	60 days
Automotive Financing | Commercial Finance Receivables
Revenue Recognition [Abstract]
Period past due threshold for suspending accrual of finance charge income	90 days