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Financial Instruments and Risk Management (Credit Risk - Aging of Trade Receivables) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Gross [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables $ 1,389 $ 1,593
Gross [Member] | Not past due [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables 1,258 1,485
Gross [Member] | Past due up to 3 months [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables 102 97
Gross [Member] | Past due 3 to 12 months [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables 27 10
Gross [Member] | Past due over 12 months [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables 2 1
Accumulated impairment [member]    
Disclosure of financial instruments [Line Items]    
Trade receivables (13) (8)
Accumulated impairment [member] | Not past due [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables (3) (3)
Accumulated impairment [member] | Past due up to 3 months [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables (1) 0
Accumulated impairment [member] | Past due 3 to 12 months [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables (7) (4)
Accumulated impairment [member] | Past due over 12 months [Member]    
Disclosure of financial instruments [Line Items]    
Trade receivables $ (2) $ (1)