v3.26.3
Segment Information - Schedule of Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Interest income $ 1,491 $ 1,392 $ 4,294 $ 4,039  
Interest expense 345 320 993 949  
Provision for finance receivable losses 615 488 1,689 1,454  
Net interest income after provision for finance receivable losses 531 584 1,612 1,636  
Other revenues 212 163 616 526  
Salaries and benefits 244 234 727 683  
Other operating expenses 213 202 628 577  
Insurance policy benefits and claims 53 48 148 150  
Income before income taxes 233 263 725 752  
Assets 28,717 26,985 28,717 26,985 $ 27,388
Consumer and Insurance | Consumer and Insurance          
Segment Reporting [Line Items]          
Interest income 1,487 1,386 4,283 4,021  
Interest expense 345 320 993 947  
Provision for finance receivable losses 615 488 1,690 1,456  
Net interest income after provision for finance receivable losses 527 578 1,600 1,618  
Other revenues 211 161 611 522  
Salaries and benefits 243 232 724 679  
Other operating expenses 211 198 622 569  
Insurance policy benefits and claims 53 48 148 150  
Income before income taxes 231 261 717 742  
Assets 27,567 25,840 27,567 25,840  
Other          
Segment Reporting [Line Items]          
Interest income 1 1 2 2  
Interest expense 0 0 0 1  
Provision for finance receivable losses 0 0 0 0  
Net interest income after provision for finance receivable losses 1 1 2 1  
Other revenues 1 2 5 5  
Salaries and benefits 1 2 3 4  
Other operating expenses 1 3 4 6  
Insurance policy benefits and claims 0 0 0 0  
Income before income taxes 0 (2) 0 (4)  
Assets 4 9 4 9  
Segment to GAAP Adjustment          
Segment Reporting [Line Items]          
Interest income 3 5 9 16  
Interest expense 0 0 0 1  
Provision for finance receivable losses 0 0 (1) (2)  
Net interest income after provision for finance receivable losses 3 5 10 17  
Other revenues 0 0 0 (1)  
Salaries and benefits 0 0 0 0  
Other operating expenses 1 1 2 2  
Insurance policy benefits and claims 0 0 0 0  
Income before income taxes 2 4 8 14  
Assets $ 1,146 $ 1,136 $ 1,146 $ 1,136