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Employee Benefit Plans - Summary of Amounts Recognized in Accumulated Comprehensive Loss (Income) for Material Defined Benefit Plans (Detail) - Material Defined Benefit Plans [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure Of Net Defined Benefit Liability Asset [Line Items]    
Balance of accumulated comprehensive loss (income) as of January 1 $ 1,242 $ 1,251
Net actuarial (gains) losses recognized in the year (79) (9)
Total accumulated comprehensive loss (income) as of December 31, 1,163 1,242
Funded Plans [Member]    
Disclosure Of Net Defined Benefit Liability Asset [Line Items]    
Balance of accumulated comprehensive loss (income) as of January 1 1,315 1,317
Net actuarial (gains) losses recognized in the year (79) (2)
Total accumulated comprehensive loss (income) as of December 31, 1,236 1,315
Unfunded Plans [Member]    
Disclosure Of Net Defined Benefit Liability Asset [Line Items]    
Balance of accumulated comprehensive loss (income) as of January 1 48 56
Net actuarial (gains) losses recognized in the year 3 (8)
Total accumulated comprehensive loss (income) as of December 31, 51 48
Other Post Employment Benefits [Member]    
Disclosure Of Net Defined Benefit Liability Asset [Line Items]    
Balance of accumulated comprehensive loss (income) as of January 1 (121) (122)
Net actuarial (gains) losses recognized in the year (3) 1
Total accumulated comprehensive loss (income) as of December 31, $ (124) $ (121)