v3.25.4
Employee Benefit Plans - Fair Value of Plan Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of fair value of plan assets [Line Items]    
Beginning of period $ (483) $ (490)
Interest income (25) (23)
Administration fees disbursements (15) (15)
Exchange differences 1 (3)
End of period (421) (483)
Fair Value of Plan Assets [Member]    
Disclosure of fair value of plan assets [Line Items]    
Beginning of period 2,174 2,421
Interest income 116 113
Return on plan assets excluding amounts included in interest income 99 (173)
Contributions by employer 32 35
Contributions by employees 3 4
Benefits paid (195) (190)
Administration fees disbursements (16) (15)
Exchange differences 57 (21)
End of period 2,270 2,174
Funded Plans [Member]    
Disclosure of fair value of plan assets [Line Items]    
Interest income (12) (10)
Administration fees disbursements (15) (15)
Funded Plans [Member] | Fair Value of Plan Assets [Member]    
Disclosure of fair value of plan assets [Line Items]    
Beginning of period 2,174 2,421
Interest income 116 113
Return on plan assets excluding amounts included in interest income 99 (173)
Contributions by employer 6 6
Contributions by employees 3 2
Benefits paid (169) (159)
Administration fees disbursements (16) (15)
Exchange differences 57 (21)
End of period 2,270 2,174
Unfunded Plans [Member]    
Disclosure of fair value of plan assets [Line Items]    
Interest income (11) (11)
Administration fees disbursements 0 0
Unfunded Plans [Member] | Fair Value of Plan Assets [Member]    
Disclosure of fair value of plan assets [Line Items]    
Beginning of period 0 0
Interest income 0 0
Return on plan assets excluding amounts included in interest income 0 0
Contributions by employer 22 22
Contributions by employees 0 0
Benefits paid (22) (22)
Administration fees disbursements 0 0
Exchange differences 0 0
End of period 0 0
Other Post Employment Benefits [Member]    
Disclosure of fair value of plan assets [Line Items]    
Beginning of period (60) (72)
Interest income (2) (2)
Administration fees disbursements 0 0
Exchange differences 1 (3)
End of period (59) (60)
Other Post Employment Benefits [Member] | Fair Value of Plan Assets [Member]    
Disclosure of fair value of plan assets [Line Items]    
Beginning of period 0 0
Interest income 0 0
Return on plan assets excluding amounts included in interest income 0 0
Contributions by employer 4 7
Contributions by employees 0 2
Benefits paid (4) (9)
Administration fees disbursements 0 0
Exchange differences 0 0
End of period $ 0 $ 0