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FINANCE COSTS, NET (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Detailed Information about Finance Income (Expense) [Line Items] |  |
Interest | $ 435 | $ 452
Amortization of debt issue costs | 2 | 5
Amortization of discount (premium) | (1) | (1)
Interest expense on lease liabilities | 6 | 0
Gain on interest rate hedges | (6) | (3)
Interest capitalized | (14) | (9)
Accretion | 75 | 87
Loss on debt extinguishment | 3 | 29
Finance income | (31) | (15)
Total | 469 | 545
Interest paid, classified as operating activities | $ 333 | $ 350
Capitalisation rate of borrowing costs eligible for capitalisation | 6.30% | 6.10%
4.4 Percent Notes Due 2021 |  |
Disclosure of Detailed Information about Finance Income (Expense) [Line Items] |  |
Borrowings, interest rate (as percent) | 4.40% |

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