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Debt - Interest Expense and LT Debt Maturities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total interest expense	$ 6,876	$ 5,596	$ 3,868
2025	39,531
2026	24,228
2027	21,160
2028	12,400
2029	11,191
Thereafter	23,247
Total	131,758
Automotive
Debt Instrument [Line Items]
Automotive interest expense	846	911	987
2025	2,143
2026	99
2027	1,830
2028	833
2029	1,051
Thereafter	9,998
Total	15,955
GM Financial
Debt Instrument [Line Items]
Financing interest expense	6,030	$ 4,685	$ 2,881
2025	37,388
2026	24,129
2027	19,330
2028	11,567
2029	10,140
Thereafter	13,249
Total	$ 115,804

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