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Financial Instruments and Risk Management (Market Risk - Terms of Derivative Financial Instruments Used to Hedge Interest Risk) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
SWAP contracts from variable interest to fixed interest [Member]    
Disclosure of detailed information about hedges [Line Items]    
Carrying amount (fair value) $ (6) $ 0
Stated amount $ 150 $ 250
Maturity date (in years) 2024 2019-2024
Interest rate range 2.47%-2.599% 1.7%-2.6%
SWAP contracts from variable USD interest to fixed EUR interest [Member]    
Disclosure of detailed information about hedges [Line Items]    
Carrying amount (fair value) $ (3) $ (1)
Stated amount $ 447 $ 334
Maturity date (in years) 19/02/2020 15/2/2019
Interest rate range 1-month libor 1-month Libor
SWAP contracts from fixed ILS interest to fixed USD interest [Member]    
Disclosure of detailed information about hedges [Line Items]    
Carrying amount (fair value) $ 57 $ 15
Stated amount $ 482 $ 486
Maturity date (in years) 2024 30/3/2024
Interest rate range 2.45%-4.474% 2.45%-4.74%