Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 1,900	$ 1,900
GM Financial
Goodwill [Line Items]
Goodwill	1,300	1,300
Cruise
Goodwill [Line Items]
Goodwill	$ 571	$ 574

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.