v3.25.2
Loans Receivable Loans Receivable (Summary of Past-Due Status) (Details) - USD ($)
Jun. 30, 2025
Dec. 31, 2024
Loans receivable    
Loans receivable [1],[2] $ 11,563,000,000 $ 11,289,100,000
Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 8,076,600,000 7,647,800,000
Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 1,770,700,000 1,873,600,000
Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 1,441,100,000 1,497,500,000
Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 274,600,000 270,200,000
Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 8,791,000,000 8,521,000,000
Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 6,194,600,000 [4] 5,887,400,000
Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,388,900,000 1,436,200,000
Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,048,800,000 1,042,700,000
Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 158,700,000 154,700,000
Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 2,772,000,000 2,768,100,000
Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 1,882,000,000 1,760,400,000
Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 381,800,000 437,400,000
Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 392,300,000 454,800,000
Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 115,900,000 115,500,000
Loans Originating Five Years Prior And Before [Member]    
Loans receivable    
Loans receivable [1],[2] 506,500,000 371,300,000
Loans Originating Five Years Prior And Before [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 61,800,000 25,500,000
Loans Originating Five Years Prior And Before [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 37,200,000 18,800,000
Loans Originating Five Years Prior And Before [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 147,600,000 87,300,000
Loans Originating Five Years Prior And Before [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 259,900,000 239,700,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 287,400,000 191,600,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 35,600,000 [4] 11,300,000
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] 20,900,000 8,200,000
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] 83,800,000 39,700,000
Loans Originating Five Years Prior And Before [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 147,100,000 132,400,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 219,100,000 179,700,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 26,200,000 14,200,000
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] 16,300,000 10,600,000
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] 63,800,000 47,600,000
Loans Originating Five Years Prior And Before [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 112,800,000 107,300,000
Loans Originating Four Years Prior [Member]    
Loans receivable    
Loans receivable [1],[2] 452,100,000 382,300,000
Loans Originating Four Years Prior [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 167,000,000.0 113,300,000
Loans Originating Four Years Prior [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 74,100,000 64,200,000
Loans Originating Four Years Prior [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 199,400,000 179,100,000
Loans Originating Four Years Prior [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 11,600,000 25,700,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 301,900,000 230,500,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 111,900,000 [4] 67,900,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 48,600,000 37,700,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 132,300,000 106,400,000
Loans Originating Four Years Prior [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 9,100,000 18,500,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 150,200,000 151,800,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 55,100,000 45,400,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 25,500,000 26,500,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 67,100,000 72,700,000
Loans Originating Four Years Prior [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 2,500,000 7,200,000
Loans Originating Three Years Prior [Member]    
Loans receivable    
Loans receivable [1],[2] 1,065,400,000 655,800,000
Loans Originating Three Years Prior [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 566,900,000 267,800,000
Loans Originating Three Years Prior [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 182,300,000 125,200,000
Loans Originating Three Years Prior [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 313,200,000 259,000,000.0
Loans Originating Three Years Prior [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 3,000,000.0 3,800,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 757,400,000 436,800,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 405,600,000 [4] 180,200,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 128,500,000 82,600,000
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 220,900,000 171,000,000.0
Loans Originating Three Years Prior [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 2,400,000 3,000,000.0
Loans Originating Three Years Prior [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 308,000,000.0 219,000,000.0
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 161,300,000 87,600,000
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 53,800,000 42,600,000
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 92,300,000 88,000,000.0
Loans Originating Three Years Prior [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 600,000 800,000
Loans Originating Two Years Prior [Member]    
Loans receivable    
Loans receivable [1],[2] 2,402,000,000 1,437,700,000
Loans Originating Two Years Prior [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 1,557,300,000 795,200,000
Loans Originating Two Years Prior [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 425,100,000 269,800,000
Loans Originating Two Years Prior [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 419,500,000 371,700,000
Loans Originating Two Years Prior [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[2],[5] 100,000 1,000,000.0
Loans Originating Two Years Prior [Member] | Dealer Loans [Member]    
Loans receivable    
Loans receivable [1] 1,752,800,000 1,024,100,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,128,300,000 [4] 569,700,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 314,900,000 191,500,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 309,500,000 262,100,000
Loans Originating Two Years Prior [Member] | Dealer Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [1],[5] 100,000 800,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member]    
Loans receivable    
Loans receivable [2] 649,200,000 413,600,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 429,000,000.0 225,500,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 110,200,000 78,300,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 110,000,000.0 109,600,000
Loans Originating Two Years Prior [Member] | Purchased Loans [Member] | Post-term [Member]    
Loans receivable    
Loans receivable [2],[5] 0 200,000
Loans Originating In The Prior Year [Member]    
Loans receivable    
Loans receivable [1],[2] 4,393,700,000 3,030,800,000
Loans Originating In The Prior Year [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 3,250,700,000 2,033,700,000
Loans Originating In The Prior Year [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 790,800,000 576,500,000
Loans Originating In The Prior Year [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 352,200,000 420,600,000
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] 3,552,900,000 2,229,200,000
Loans Originating In The Prior Year [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 2,600,400,000 [4] 1,487,000,000
Loans Originating In The Prior Year [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 658,100,000 429,400,000
Loans Originating In The Prior Year [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 294,400,000 312,800,000
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] 840,800,000 801,600,000
Loans Originating In The Prior Year [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 650,300,000 546,700,000
Loans Originating In The Prior Year [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 132,700,000 147,100,000
Loans Originating In The Prior Year [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 57,800,000 107,800,000
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] 2,743,300,000 5,411,200,000
Loans Originating In The Current Year [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3],[4] 2,472,900,000 4,412,300,000
Loans Originating In The Current Year [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 261,200,000 819,100,000
Loans Originating In The Current Year [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[2],[3] 9,200,000 179,800,000
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] 2,138,600,000 4,408,800,000
Loans Originating In The Current Year [Member] | Dealer Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 1,912,800,000 [4] 3,571,300,000
Loans Originating In The Current Year [Member] | Dealer Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 217,900,000 686,800,000
Loans Originating In The Current Year [Member] | Dealer Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [1],[3] 7,900,000 150,700,000
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] 604,700,000 1,002,400,000
Loans Originating In The Current Year [Member] | Purchased Loans [Member] | Current, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3],[4] 560,100,000 841,000,000.0
Loans Originating In The Current Year [Member] | Purchased Loans [Member] | Past Due 11-90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 43,300,000 132,300,000
Loans Originating In The Current Year [Member] | Purchased Loans [Member] | Past Due Over 90 Days, Pre-term [Member]    
Loans receivable    
Loans receivable [2],[3] 1,300,000 29,100,000
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 or month of purchase 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.