v3.26.1
Segment Information (Details)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
subsegment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting [Abstract]          
Number of operating segments | segment     3    
Number of reportable segments | segment     3    
Number of operating subsegments | subsegment     2    
Segment Reporting [Line Items]          
Total financing revenue and other interest income $ 3,465 $ 3,325 $ 6,839 $ 6,718  
Total interest expense 1,512 1,593 3,029 3,268  
Net depreciation expense on operating lease assets 269 216 537 456  
Net financing revenue and other interest income 1,684 1,516 3,273 2,994  
Other revenue 602 566 1,115 629  
Total net revenue 2,286 2,082 4,388 3,623  
Provision for credit losses 430 384 897 575  
Compensation and benefits expense 458 430 949 935  
Insurance losses and loss adjustment expenses 208 203 329 364  
Goodwill impairment 0 0 0 305 $ 305
Other operating expenses          
Technology and communications 108 101 209 204  
Other 545 528 1,067 1,088  
Total other operating expenses 653 629 1,276 1,292  
Total noninterest expense 1,319 1,262 2,554 2,896  
Income from continuing operations before income tax expense 537 436 937 152  
Total assets 199,772 189,473 199,772 189,473 196,002
Net financing revenue and other interest income after the provision for credit losses 1,300 1,100 2,400 2,400  
Operating Segments | Automotive Finance operations          
Segment Reporting [Line Items]          
Total financing revenue and other interest income 2,763 2,603 5,450 5,174  
Total interest expense 1,178 1,093 2,306 2,158  
Net depreciation expense on operating lease assets 269 216 537 456  
Net financing revenue and other interest income 1,316 1,294 2,607 2,560  
Other revenue 104 97 209 194  
Total net revenue 1,420 1,391 2,816 2,754  
Provision for credit losses 442 387 910 821  
Compensation and benefits expense 177 166 368 349  
Insurance losses and loss adjustment expenses 0 0 0 0  
Goodwill impairment     0 0 0
Other operating expenses          
Technology and communications 29 30 57 59  
Other 362 336 735 678  
Total other operating expenses 391 366 792 737  
Total noninterest expense 568 532 1,160 1,086  
Income from continuing operations before income tax expense 410 472 746 847  
Total assets 121,539 111,709 121,539 111,709  
Operating Segments | Insurance operations          
Segment Reporting [Line Items]          
Total financing revenue and other interest income 51 45 100 89  
Total interest expense 13 15 26 29  
Net depreciation expense on operating lease assets 0 0 0 0  
Net financing revenue and other interest income 38 30 74 60  
Other revenue 449 422 791 786  
Total net revenue 487 452 865 846  
Provision for credit losses 0 0 0 0  
Compensation and benefits expense 30 26 62 56  
Insurance losses and loss adjustment expenses 208 203 329 364  
Goodwill impairment     0 0 0
Other operating expenses          
Technology and communications 4 4 8 9  
Other 192 191 385 387  
Total other operating expenses 196 195 393 396  
Total noninterest expense 434 424 784 816  
Income from continuing operations before income tax expense 53 28 81 30  
Total assets 10,031 9,705 10,031 9,705  
Operating Segments | Corporate Finance operations          
Segment Reporting [Line Items]          
Total financing revenue and other interest income 252 233 495 454  
Total interest expense 136 125 266 242  
Net depreciation expense on operating lease assets 0 0 0 0  
Net financing revenue and other interest income 116 108 229 212  
Other revenue 29 19 64 48  
Total net revenue 145 127 293 260  
Provision for credit losses (12) (2) (4) 12  
Compensation and benefits expense 20 19 46 44  
Insurance losses and loss adjustment expenses 0 0 0 0  
Goodwill impairment       0  
Other operating expenses          
Technology and communications 2 1 3 2  
Other 13 13 32 30  
Total other operating expenses 15 14 35 32  
Total noninterest expense 35 33 81 76  
Income from continuing operations before income tax expense 122 96 216 172  
Total assets 13,893 11,040 13,893 11,040  
Corporate and Other          
Segment Reporting [Line Items]          
Total financing revenue and other interest income 399 444 794 1,001  
Total interest expense 185 360 431 839  
Net depreciation expense on operating lease assets 0 0 0 0  
Net financing revenue and other interest income 214 84 363 162  
Other revenue 20 28 51 (399)  
Total net revenue 234 112 414 (237)  
Provision for credit losses 0 (1) (9) (258)  
Compensation and benefits expense 231 219 473 486  
Insurance losses and loss adjustment expenses 0 0 0 0  
Goodwill impairment     0 305 $ 305
Other operating expenses          
Technology and communications 73 66 141 134  
Other (22) (12) (85) (7)  
Total other operating expenses 51 54 56 127  
Total noninterest expense 282 273 529 918  
Income from continuing operations before income tax expense (48) (160) (106) (897)  
Total assets $ 54,309 $ 57,019 $ 54,309 $ 57,019