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v3.19.2

Exceptional Items - Additional Information (Detail) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2018 | Dec. 31, 2017 | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) kt
Disclosure of exceptional items [line items] |  |  |  |  |
Exceptional items net |  |  | $ 818 | $ 2,970 | $ 1,006
US corporate tax rate |  |  | 30.00% | 30.00% | 30.00%
Taxation (income) charges related to exceptional items |  |  | $ (242) | $ 2,320 | $ 243
Exceptional gain (loss), before tax |  |  | 1,060 | 650 | 763
One-off dividend to parent |  |  | 12,507 | 6,720 | 3,472
Samarco dam failure [member] |  |  |  |  |
Disclosure of exceptional items [line items] |  |  |  |  |
Exceptional items net |  |  | 1,060 | 650 | 381
Taxation (income) charges related to exceptional items |  |  | 0 | 0 | 0
Exceptional gain (loss), before tax |  |  | $ 1,060 | 650 | 381
US tax reform [member] |  |  |  |  |
Disclosure of exceptional items [line items] |  |  |  |  |
Exceptional items net |  |  |  | 2,320 |
US corporate tax rate | 21.00% | 35.00% |  |  |
Taxation (income) charges related to exceptional items |  |  |  | $ 2,320 |
Escondida industrial action [member] |  |  |  |  |
Disclosure of exceptional items [line items] |  |  |  |  |
Exceptional items net |  |  |  |  | 367
Taxation (income) charges related to exceptional items |  |  |  |  | $ (179)
Reduction in copper production | kt |  |  |  |  | 214
Exceptional gain (loss), before tax |  |  |  |  | $ 546
Depreciation |  |  |  |  | 212
Cancellation of the Caroona exploration licence [member] |  |  |  |  |
Disclosure of exceptional items [line items] |  |  |  |  |
Exceptional items net |  |  |  |  | (115)
Taxation (income) charges related to exceptional items |  |  |  |  | 49
Exceptional gain (loss), before tax |  |  |  |  | (164)
Withholding tax on Chilean dividends [member] |  |  |  |  |
Disclosure of exceptional items [line items] |  |  |  |  |
Exceptional items net |  |  |  |  | 373
Taxation (income) charges related to exceptional items |  |  |  |  | 373
BHP Billiton Chile Inversiones Limitada [member] | Withholding tax on Chilean dividends [member] |  |  |  |  |
Disclosure of exceptional items [line items] |  |  |  |  |
One-off dividend to parent |  |  |  |  | $ 2,300

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