v3.26.1
Loans Receivable Loans Receivable (Summary of Past-Due Status) (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Loans receivable    
Loans receivable [1],[2] $ 11,608,700,000 $ 11,511,500,000
Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 8,111,300,000 7,807,200,000
Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 1,826,300,000 1,904,700,000
Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 1,413,500,000 1,534,600,000
Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 257,600,000 265,000,000.0
Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 8,787,500,000 8,790,800,000
Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 6,103,000,000 [4] 5,967,200,000
Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,441,400,000 1,506,800,000
Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,085,100,000 1,160,500,000
Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 158,000,000.0 156,300,000
Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 2,821,200,000 2,720,700,000
Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 2,008,300,000 1,840,000,000
Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 384,900,000 397,900,000
Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 328,400,000 374,100,000
Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 99,600,000 108,700,000
Loans Originating Five Years Prior And Before [Member]    
Loans receivable    
Loans receivable [1],[2] 433,100,000 337,700,000
Loans Originating Five Years Prior And Before [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 45,000,000.0 20,000,000.0
Loans Originating Five Years Prior And Before [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 26,100,000 14,800,000
Loans Originating Five Years Prior And Before [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 118,800,000 66,000,000.0
Loans Originating Five Years Prior And Before [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 243,200,000 236,900,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 269,900,000 193,600,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 29,500,000 [4] 11,800,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 16,500,000 8,400,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 77,100,000 38,900,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 146,800,000 134,500,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 163,200,000 144,100,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 15,500,000 8,200,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 9,600,000 6,400,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 41,700,000 27,100,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 96,400,000 102,400,000
Loans Originating Four Years Prior [Member]    
Loans receivable    
Loans receivable [1],[2] 540,600,000 304,200,000
Loans Originating Four Years Prior [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 235,700,000 87,200,000
Loans Originating Four Years Prior [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 84,100,000 46,100,000
Loans Originating Four Years Prior [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 208,600,000 149,500,000
Loans Originating Four Years Prior [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 12,200,000 21,400,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 384,600,000 204,100,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 167,700,000 [4] 58,500,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 58,900,000 29,800,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 148,500,000 99,300,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 9,500,000 16,500,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 156,000,000.0 100,100,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 68,000,000.0 28,700,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 25,200,000 16,300,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 60,100,000 50,200,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 2,700,000 4,900,000
Loans Originating Three Years Prior [Member]    
Loans receivable    
Loans receivable [1],[2] 1,367,200,000 775,400,000
Loans Originating Three Years Prior [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 794,600,000 370,800,000
Loans Originating Three Years Prior [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 235,100,000 130,600,000
Loans Originating Three Years Prior [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 335,400,000 268,000,000.0
Loans Originating Three Years Prior [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 2,100,000 6,000,000.0
Loans Originating Three Years Prior [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 987,200,000 552,100,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 567,600,000 [4] 265,200,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 171,500,000 92,100,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 246,500,000 190,100,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 1,600,000 4,700,000
Loans Originating Three Years Prior [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 380,000,000.0 223,300,000
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 227,000,000.0 105,600,000
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 63,600,000 38,500,000
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 88,900,000 77,900,000
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 500,000 1,300,000
Loans Originating Two Years Prior [Member]    
Loans receivable    
Loans receivable [1],[2] 2,825,500,000 1,858,400,000
Loans Originating Two Years Prior [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 1,817,400,000 1,112,500,000
Loans Originating Two Years Prior [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 534,500,000 337,900,000
Loans Originating Two Years Prior [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 473,500,000 407,300,000
Loans Originating Two Years Prior [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 100,000 700,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 2,218,500,000 1,349,800,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,404,900,000 [4] 801,800,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 429,200,000 247,500,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 384,300,000 299,900,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 100,000 600,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 607,000,000.0 508,600,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 412,500,000 310,700,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 105,300,000 90,400,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 89,200,000 107,400,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 0 100,000
Loans Originating In The Prior Year [Member]    
Loans receivable    
Loans receivable [1],[2] 3,758,100,000 3,607,300,000
Loans Originating In The Prior Year [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 2,800,100,000 2,394,000,000
Loans Originating In The Prior Year [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 688,800,000 711,800,000
Loans Originating In The Prior Year [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 269,200,000 501,500,000
Loans Originating In The Prior Year [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 0 0
Loans Originating In The Prior Year [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 2,912,300,000 2,876,400,000
Loans Originating In The Prior Year [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 2,128,300,000 [4] 1,882,700,000
Loans Originating In The Prior Year [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 561,700,000 581,300,000
Loans Originating In The Prior Year [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 222,300,000 412,400,000
Loans Originating In The Prior Year [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 0 0
Loans Originating In The Prior Year [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 845,800,000 730,900,000
Loans Originating In The Prior Year [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 671,800,000 511,300,000
Loans Originating In The Prior Year [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 127,100,000 130,500,000
Loans Originating In The Prior Year [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 46,900,000 89,100,000
Loans Originating In The Prior Year [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 0 0
Loans Originating In The Current Year [Member]    
Loans receivable    
Loans receivable [1],[2] 2,684,200,000 4,628,500,000
Loans Originating In The Current Year [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 2,418,500,000 3,822,700,000
Loans Originating In The Current Year [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 257,700,000 663,500,000
Loans Originating In The Current Year [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 8,000,000.0 142,300,000
Loans Originating In The Current Year [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 0 0
Loans Originating In The Current Year [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 2,015,000,000 3,614,800,000
Loans Originating In The Current Year [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,805,000,000 [4] 2,947,200,000
Loans Originating In The Current Year [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 203,600,000 547,700,000
Loans Originating In The Current Year [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 6,400,000 119,900,000
Loans Originating In The Current Year [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 0 0
Loans Originating In The Current Year [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 669,200,000 1,013,700,000
Loans Originating In The Current Year [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 613,500,000 875,500,000
Loans Originating In The Current Year [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 54,100,000 115,800,000
Loans Originating In The Current Year [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 1,600,000 22,400,000
Loans Originating In The Current Year [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] $ 0 $ 0
[1] As Consumer Loans are aggregated by Dealer for purposes of recognizing revenue and measuring credit losses, the Dealer Loan amount was estimated by allocating the balance of each Dealer Loan to the underlying Consumer Loans based on the forecasted future collections of each Consumer Loan.
[2] As certain Consumer Loans are aggregated by Dealer for purposes of recognizing revenue and measuring credit losses, the Purchased Loan amount was estimated by allocating the balance of certain Purchased Loans to the underlying Consumer Loans based on the forecasted future collections of each Consumer Loan.
[3] Represents the Loan balance attributable to Consumer Loans outstanding within their initial loan terms.
[4] We consider a Consumer Loan to be current for purposes of forecasting expected collection rates if contractual repayments are less than 11 days past due.
[5] Represents the Loan balance attributable to Consumer Loans outstanding beyond their initial loan terms.