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CASH, CASH EQUIVALENTS, AND MARKETABLE SECURITIES - Schedule of Sales Proceeds and Gross Realized Gains/Losses (Details) - Company excluding Ford Credit - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Sales proceeds $ 2,608 $ 2,449
Gross realized gains 10 5
Gross realized losses $ 1 $ 3