v3.26.3
Related Party Transactions - Wholesale Marketplace Revenues (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Related Party Transaction [Line Items]        
Net sales and operating revenues $ 8,040 $ 5,647 $ 21,848 $ 14,719
Cost of sales 6,519 4,499 17,672 11,578
Related Party        
Related Party Transaction [Line Items]        
Cost of sales 4 3 13 10
DriveTime Automotive Group, Inc. | Wholesale Marketplace Revenues | Related Party        
Related Party Transaction [Line Items]        
Net sales and operating revenues $ 2 3 $ 7 10
Cost of sales   $ 1   $ 1