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Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Parenthetical) (Details)
$ in Millions
9 Months Ended
Sep. 30, 2025
USD ($)
Business Combination, Separately Recognized Transactions [Line Items]  
Total consideration $ 9,849
Purchased Customer Accounts  
Business Combination, Separately Recognized Transactions [Line Items]  
Weighted average life (years) 14 years
Other Acquisitions [Member] | Maximum [Member]  
Business Combination, Separately Recognized Transactions [Line Items]  
Total consideration $ 50