v3.26.1
Fair Value (Financial Assets and Liabilities, Not Measured at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Held-to-maturity, Fair Value $ 471 $ 489
Debt Securities, Held-to-maturity 474 490
Loans Receivable, Fair Value Disclosure 880 882
Loan receivables carrying value 9,415 8,860
Quoted Prices in Active Markets (Level 1) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans Receivable, Fair Value Disclosure 0 0
Other Observable Inputs (Level 2) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans Receivable, Fair Value Disclosure 0 0
Unobservable Inputs (Level 3) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans Receivable, Fair Value Disclosure 880 882
Fair Value, Nonrecurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Held-to-maturity, Fair Value 471 489
Debt and other financing obligations 69,323 72,143
Loans Receivable, Fair Value Disclosure 9,234 8,623
Fair Value, Nonrecurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Held-to-maturity, Fair Value 447 463
Debt and other financing obligations 0 0
Loans Receivable, Fair Value Disclosure 0 0
Fair Value, Nonrecurring [Member] | Other Observable Inputs (Level 2) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Held-to-maturity, Fair Value 24 26
Debt and other financing obligations 69,323 72,143
Loans Receivable, Fair Value Disclosure 1,750 1,700
Fair Value, Nonrecurring [Member] | Unobservable Inputs (Level 3) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Held-to-maturity, Fair Value 0 0
Debt and other financing obligations 0 0
Loans Receivable, Fair Value Disclosure 7,484 6,923
Long-term debt and other financing obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt and other financing obligations, carrying value $ 74,537 $ 76,140