v3.26.1
Financial Instruments - Summary of Debt and Related Derivative Instruments (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities $ 23 $ 16
Long-term portion 1,323 1,328
Derivative instrument liability, Current portion 0 0
Derivative instrument liability, Long-term portion 23 16
At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 23 16
Commercial Paper [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 0 0
Commercial Paper [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 0 0
3.35% Notes, due 2026 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities   0
3.35% Notes, due 2026 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities   0
5.85% Notes, due 2040 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 3 0
5.85% Notes, due 2040 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 3 0
4.50% Notes, due 2043 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 3 3
4.50% Notes, due 2043 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 3 3
5.65% Notes, due 2043 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 17 13
5.65% Notes, due 2043 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 17 13
5.50% Debentures, due 2035 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 0 0
5.50% Debentures, due 2035 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Derivative financial liabilities 0 0
Primary debt instruments [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 2,941 2,123
Current portion 1,618 795
Long-term portion 1,323 1,328
Primary debt instruments [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 2,963 2,182
Primary debt instruments [member] | Commercial Paper [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 1,618 295
Primary debt instruments [member] | Commercial Paper [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 1,620 295
Primary debt instruments [member] | 3.35% Notes, due 2026 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings   500
Primary debt instruments [member] | 3.35% Notes, due 2026 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings   498
Primary debt instruments [member] | 5.85% Notes, due 2040 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 489 490
Primary debt instruments [member] | 5.85% Notes, due 2040 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 496 520
Primary debt instruments [member] | 4.50% Notes, due 2043 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 113 114
Primary debt instruments [member] | 4.50% Notes, due 2043 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 98 99
Primary debt instruments [member] | 5.65% Notes, due 2043 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 326 329
Primary debt instruments [member] | 5.65% Notes, due 2043 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 344 353
Primary debt instruments [member] | 5.50% Debentures, due 2035 [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings 395 395
Primary debt instruments [member] | 5.50% Debentures, due 2035 [member] | At fair value [member]    
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]    
Borrowings $ 405 $ 417