v3.25.4
Financial Instruments - Summary of Debt and Related Derivative Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings $ 2,123 $ 2,820  
Derivative financial liabilities 16 21  
Current portion 795 973  
Long-term portion 1,328 1,847  
Derivative instrument liability, Current portion 0 21  
Derivative instrument liability, Long-term portion 16 0  
At fair value [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 16 21  
Commercial Paper [Member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 0    
Commercial Paper [Member] | At fair value [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 0    
2.239% Notes, due 2025 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities   21  
2.239% Notes, due 2025 [member] | At fair value [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities   21  
3.85% Notes, due 2024 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings     $ 450
3.35% Notes, due 2026 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 0 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 0  
5.85% Notes, due 2040 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 0 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 0 0  
4.50% Notes, due 2043 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 3 0  
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 0  
5.65% Notes, due 2043 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 13 0  
5.65% Notes, due 2043 [member] | At fair value [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Derivative financial liabilities 13 0  
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 2,123 2,820  
Current portion 795 973  
Long-term portion 1,328 1,847  
Primary debt instruments [member] | At fair value [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 2,182 2,799  
Primary debt instruments [member] | Commercial Paper [Member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 295    
Primary debt instruments [member] | Commercial Paper [Member] | At fair value [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 295    
Primary debt instruments [member] | 2.239% Notes, due 2025 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings   973  
Primary debt instruments [member] | 2.239% Notes, due 2025 [member] | At fair value [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings   968  
Primary debt instruments [member] | 3.35% Notes, due 2026 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 500 499  
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 498 491  
Primary debt instruments [member] | 5.85% Notes, due 2040 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 490 493  
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 520 507  
Primary debt instruments [member] | 4.50% Notes, due 2043 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 114 116  
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 99 94  
Primary debt instruments [member] | 5.65% Notes, due 2043 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 329 342  
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 353 338  
Primary debt instruments [member] | 5.50% Debentures, due 2035 [member]      
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]      
Borrowings 395 397  
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 $ 417 $ 401