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Other Assets and Liabilities - Right of Use Assets and Future Maturities of Lease Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Operating Leases    
ROU assets $ 995 $ 1,045
Lease liabilities $ 1,206 $ 1,276
Weighted average remaining term 6 years 7 months 6 days 6 years 8 months 12 days
Weighted average discount rate 3.90% 3.80%