v3.26.1
Segment Information - Schedule of Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Interest income $ 1,417 $ 1,339 $ 2,804 $ 2,648  
Interest expense 326 317 649 629  
Provision for finance receivable losses 610 511 1,074 967  
Net interest income after provision for finance receivable losses 481 511 1,081 1,052  
Other revenues 207 176 404 364  
Salaries and benefits 243 230 483 448  
Other operating expenses 205 189 414 376  
Insurance policy benefits and claims 44 54 96 103  
Income before income taxes 196 214 492 489  
Assets 27,424 26,628 27,424 26,628 $ 27,388
Consumer and Insurance | Consumer and Insurance          
Segment Reporting [Line Items]          
Interest income 1,413 1,333 2,796 2,635  
Interest expense 326 317 648 628  
Provision for finance receivable losses 610 511 1,075 967  
Net interest income after provision for finance receivable losses 477 505 1,073 1,040  
Other revenues 206 175 401 361  
Salaries and benefits 242 229 481 446  
Other operating expenses 203 186 410 371  
Insurance policy benefits and claims 44 54 96 103  
Income before income taxes 194 211 487 481  
Assets 26,274 25,485 26,274 25,485  
Other          
Segment Reporting [Line Items]          
Interest income 1 1 2 1  
Interest expense 0 0 1 0  
Provision for finance receivable losses 0 0 0 0  
Net interest income after provision for finance receivable losses 1 1 1 1  
Other revenues 1 2 3 4  
Salaries and benefits 1 1 2 2  
Other operating expenses 2 3 3 4  
Insurance policy benefits and claims 0 0 0 0  
Income before income taxes (1) (1) (1) (1)  
Assets 5 10 5 10  
Segment to GAAP Adjustment          
Segment Reporting [Line Items]          
Interest income 3 5 6 12  
Interest expense 0 0 0 1  
Provision for finance receivable losses 0 0 (1) 0  
Net interest income after provision for finance receivable losses 3 5 7 11  
Other revenues 0 (1) 0 (1)  
Salaries and benefits 0 0 0 0  
Other operating expenses 0 0 1 1  
Insurance policy benefits and claims 0 0 0 0  
Income before income taxes 3 4 6 9  
Assets $ 1,145 $ 1,133 $ 1,145 $ 1,133