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Indebtedness - Principal Payments Due on Long-Term Borrowings (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Debt Disclosure [Abstract]    
2026 (After March 31,) $ 0  
2027 576  
2028 500  
2029 400  
2030 864  
Thereafter 4,800  
Total principal payment $ 7,140 $ 7,168