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Net finance costs (Tables) | 12 Months Ended
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Jun. 30, 2019
Text block [abstract] |
Summary of Net Finance Costs |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | US$M |  |  | US$M |  |  | US$M |
Financial expenses |  |  |  |  |  |  |  |  |  |  |  |
Interest expense using the effective interest rate method: |  |  |  |  |  |  |  |  |  |  |  |
Interest on bank loans, overdrafts and all other borrowings |  |  | 1,296 |  |  |  | 1,168 |  |  |  | 1,130 |
Interest capitalised at 4.96% (2018: 4.24%; 2017: 3.25%) (1) |  |  | (248 | ) |  |  | (139 | ) |  |  | (113 | )
Interest on finance leases |  |  | 47 |  |  |  | 59 |  |  |  | 33 |
Discounting on provisions and other liabilities |  |  | 470 |  |  |  | 414 |  |  |  | 450 |
Other gains and losses: |  |  |  |  |  |  |  |  |  |  |  |
Fair value change on hedged loans |  |  | 729 |  |  |  | (265 | ) |  |  | (1,185 | )
Fair value change on hedging derivatives |  |  | (809 | ) |  |  | 329 |  |  |  | 1,244 |
Exchange variations on net debt |  |  | 6 |  |  |  | (19 | ) |  |  | (23 | )
Other |  |  | 19 |  |  |  | 20 |  |  |  | 24 |
Total financial expenses |  |  | 1,510 |  |  |  | 1,567 |  |  |  | 1,560 |
Financial income |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  | (446 | ) |  |  | (322 | ) |  |  | (143 | )
Net finance costs |  |  | 1,064 |  |  |  | 1,245 |  |  |  | 1,417 |
(1) | Interest has been capitalised at the rate of interest applicable to the specific borrowings financing the assets under construction or, where financed through general borrowings, at a capitalisation rate representing the average interest rate on such borrowings. Tax relief for capitalised interest is approximately US$74 million (2018: US$42 million; 2017: US$34 million).

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