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Risks Arising from Financial Instruments - Summary of Notional Amounts of Derivatives Outstanding at Year-end by Maturity Bucket (Detail) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Less than 1 year [member] | Foreign exchange forwards [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount $ 13,440 $ 11,445
Less than 1 year [member] | Foreign currency futures [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 245 503
Less than 1 year [member] | Interest rate swap [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 580 1,000
Less than 1 year [member] | Cross currency interest rate swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 1,217 900
Less than 1 year [member] | Aluminum swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 1,780 2,161
Less than 1 year [member] | Other commodity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 913 1,160
Less than 1 year [member] | Equity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 11,189 10,800
1-2 years [member] | Foreign exchange forwards [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 105 479
1-2 years [member] | Foreign currency futures [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
1-2 years [member] | Interest rate swap [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
1-2 years [member] | Cross currency interest rate swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 1,863 1,923
1-2 years [member] | Aluminum swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 4
1-2 years [member] | Other commodity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 25 22
1-2 years [member] | Equity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
2-3 years [member] | Foreign exchange forwards [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 300 0
2-3 years [member] | Foreign currency futures [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
2-3 years [member] | Interest rate swap [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
2-3 years [member] | Cross currency interest rate swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 510 1,834
2-3 years [member] | Aluminum swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
2-3 years [member] | Other commodity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
2-3 years [member] | Equity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
3-5 years [member] | Foreign exchange forwards [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
3-5 years [member] | Foreign currency futures [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
3-5 years [member] | Interest rate swap [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
3-5 years [member] | Cross currency interest rate swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 4,353 2,608
3-5 years [member] | Aluminum swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
3-5 years [member] | Other commodity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
3-5 years [member] | Equity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
Greater than 5 years [member] | Foreign exchange forwards [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
Greater than 5 years [member] | Foreign currency futures [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
Greater than 5 years [member] | Interest rate swap [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
Greater than 5 years [member] | Cross currency interest rate swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 717 560
Greater than 5 years [member] | Aluminum swaps [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
Greater than 5 years [member] | Other commodity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount 0 0
Greater than 5 years [member] | Equity derivatives [Member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount $ 0 $ 0