Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.25.0.1
Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Accrued expenses and other current liabilities $ 265,000,000 $ 299,000,000
Accrued expenses and other current liabilities 186,000,000 172,000,000
Cumulative-effect benefit to retained earnings 654,000,000 488,000,000
Deferred loyalty program revenue    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Loyalty program liability 105,000,000 117,000,000
Accrued expenses and other current liabilities 65,000,000 75,000,000
Accrued expenses and other current liabilities $ 40,000,000 $ 42,000,000
Maximum    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Historical collection attrition rate, period 10 years