v3.26.1
Revenue from Contracts with Customers (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers $ 310 $ 312 $ 617 $ 635        
All other revenue 292 254 498 (6)        
Total other revenue 602 566 1,115 629        
Remarketing losses, net 2 0 12 19        
Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Remarketing losses, net 2   12 19        
Noninsurance contracts                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 245 241 487 482        
Noninsurance contracts | Insurance operations                
Disaggregation of Revenue [Line Items]                
Unearned revenue, remaining performance obligation, amount 3,000 3,000 3,000 3,000 $ 3,000 $ 3,000 $ 3,000 $ 3,000
Unearned revenue, revenue recognized 242 238 481 476        
Capitalized contract cost, net 1,800 1,800 1,800 1,800 $ 1,800 $ 1,800 $ 1,800 $ 1,800
Capitalized contract cost, amortization 138 135 276 276        
Noninsurance contracts | Insurance operations | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01                
Disaggregation of Revenue [Line Items]                
Unearned revenue, remaining performance obligation, amount $ 445   $ 445          
Remaining performance obligation, expected timing of satisfaction, period 6 months   6 months          
Noninsurance contracts | Insurance operations | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01                
Disaggregation of Revenue [Line Items]                
Unearned revenue, remaining performance obligation, amount $ 788   $ 788          
Remaining performance obligation, expected timing of satisfaction, period 1 year   1 year          
Noninsurance contracts | Insurance operations | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01                
Disaggregation of Revenue [Line Items]                
Unearned revenue, remaining performance obligation, amount $ 639   $ 639          
Remaining performance obligation, expected timing of satisfaction, period 1 year   1 year          
Noninsurance contracts | Insurance operations | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01                
Disaggregation of Revenue [Line Items]                
Unearned revenue, remaining performance obligation, amount $ 481   $ 481          
Remaining performance obligation, expected timing of satisfaction, period 1 year   1 year          
Noninsurance contracts | Insurance operations | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01                
Disaggregation of Revenue [Line Items]                
Unearned revenue, remaining performance obligation, amount $ 646   $ 646          
Remaining performance obligation, expected timing of satisfaction, period            
Remarketing fee income                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers $ 30 31 $ 62 62        
Brokerage commissions and other revenue                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 18 20 37 40        
Banking fees and interchange income                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 6 6 11 25        
Customer rewards expense       6        
Brokered/agent commissions                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 2 7 4 12        
Other                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 9 7 16 14        
Operating Segments | Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 37 36 75 72        
All other revenue 67 61 134 122        
Total other revenue 104 97 209 194        
Operating Segments | Insurance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 248 249 492 496        
All other revenue 201 173 299 290        
Total other revenue 449 422 791 786        
Operating Segments | Corporate Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
All other revenue 29 19 64 48        
Total other revenue 29 19 64 48        
Operating Segments | Noninsurance contracts | Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Noninsurance contracts | Insurance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 245 241 487 482        
Operating Segments | Noninsurance contracts | Corporate Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Remarketing fee income | Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 30 31 62 62        
Operating Segments | Remarketing fee income | Insurance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Remarketing fee income | Corporate Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Brokerage commissions and other revenue | Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Brokerage commissions and other revenue | Insurance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Brokerage commissions and other revenue | Corporate Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Banking fees and interchange income | Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Banking fees and interchange income | Insurance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Banking fees and interchange income | Corporate Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Brokered/agent commissions | Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Brokered/agent commissions | Insurance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 2 7 4 12        
Operating Segments | Brokered/agent commissions | Corporate Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Operating Segments | Other | Automotive Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 7 5 13 10        
Operating Segments | Other | Insurance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 1 1 1 2        
Operating Segments | Other | Corporate Finance operations                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Corporate and Other                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 25 27 50 67        
All other revenue (5) 1 1 (466)        
Total other revenue 20 28 51 (399)        
Corporate and Other | Noninsurance contracts                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Corporate and Other | Remarketing fee income                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Corporate and Other | Brokerage commissions and other revenue                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 18 20 37 40        
Corporate and Other | Banking fees and interchange income                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 6 6 11 25        
Corporate and Other | Brokered/agent commissions                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers 0 0 0 0        
Corporate and Other | Other                
Disaggregation of Revenue [Line Items]                
Revenue from contracts with customers $ 1 $ 1 $ 2 $ 2