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Segment Reporting - Summary of Reportable Segments (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Disclosure of reportable segments [Line Items] |  |  |
Revenue | $ 43,638 | $ 36,135 | $ 28,567
Underlying EBITDA | 23,183 | 19,350 | 11,720
Depreciation and amortisation | (6,288) | (5,972) | (6,210)
Impairment losses | (333) | (188) | (186)
Underlying EBIT | 16,562 | 13,190 | 5,324
Exceptional items | (566) | (636) | (2,520)
Net finance costs | (1,245) | (1,417) | (1,013)
Profit (loss) before taxation | 14,751 | 11,137 | 1,791
Capital expenditure (cash basis) | 4,979 | 3,697 | 5,707
Profit/(loss) from equity accounted investments, related impairments and expenses | 147 | 272 | (2,104)
Investments accounted for using the equity method | 2,473 | 2,448 | 2,575
Total assets | 111,993 | 117,006 | 118,953
Total liabilities | 51,323 | 54,280 | 58,882
Revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 43,638 | 36,135 | 28,567
Reportable segments [member] | Petroleum [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 5,408 | 4,722 | 4,549
Underlying EBITDA | 3,341 | 3,117 | 3,038
Depreciation and amortisation | (1,719) | (1,648) | (1,696)
Impairment losses | (76) | (102) | (24)
Underlying EBIT | 1,546 | 1,367 | 1,318
Capital expenditure (cash basis) | 656 | 917 | 1,278
Profit/(loss) from equity accounted investments, related impairments and expenses | (4) | (3) | (7)
Investments accounted for using the equity method | 249 | 264 | 280
Total assets | 12,938 | 13,726 | 14,120
Total liabilities | 4,886 | 4,715 | 4,264
Reportable segments [member] | Petroleum [member] | Revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 5,333 | 4,639 | 4,431
Reportable segments [member] | Petroleum [member] | Inter-segment revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 75 | 83 | 118
Reportable segments [member] | Copper [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 13,287 | 8,335 | 8,249
Underlying EBITDA | 6,522 | 3,545 | 2,619
Depreciation and amortisation | (1,920) | (1,525) | (1,560)
Impairment losses | (213) | (14) | (17)
Underlying EBIT | 4,389 | 2,006 | 1,042
Exceptional items |  | (546) |
Capital expenditure (cash basis) | 2,428 | 1,484 | 2,786
Profit/(loss) from equity accounted investments, related impairments and expenses | 467 | 295 | 155
Investments accounted for using the equity method | 1,335 | 1,306 | 1,388
Total assets | 26,824 | 26,743 | 26,143
Total liabilities | 3,145 | 2,643 | 2,299
Reportable segments [member] | Copper [member] | Revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 13,287 | 8,335 | 8,249
Reportable segments [member] | Iron Ore [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 14,810 | 14,624 | 10,538
Underlying EBITDA | 8,930 | 9,077 | 5,599
Depreciation and amortisation | (1,721) | (1,828) | (1,817)
Impairment losses | (14) | (52) | (42)
Underlying EBIT | 7,195 | 7,197 | 3,740
Exceptional items | (539) | (203) | (2,388)
Capital expenditure (cash basis) | 1,074 | 805 | 1,061
Profit/(loss) from equity accounted investments, related impairments and expenses | (509) | (172) | (2,244)
Total assets | 22,208 | 22,781 | 24,330
Total liabilities | 3,888 | 3,606 | 3,789
Reportable segments [member] | Iron Ore [member] | Revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 14,797 | 14,606 | 10,516
Reportable segments [member] | Iron Ore [member] | Inter-segment revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 13 | 18 | 22
Reportable segments [member] | Coal [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 8,889 | 7,578 | 4,518
Underlying EBITDA | 4,397 | 3,784 | 635
Depreciation and amortisation | (686) | (719) | (890)
Impairment losses | (29) | (15) | (94)
Underlying EBIT | 3,682 | 3,050 | (349)
Exceptional items |  | 164 |
Capital expenditure (cash basis) | 409 | 246 | 298
Profit/(loss) from equity accounted investments, related impairments and expenses | 192 | 152 | (9)
Investments accounted for using the equity method | 883 | 873 | 901
Total assets | 12,257 | 11,996 | 12,754
Total liabilities | 2,404 | 1,860 | 2,103
Reportable segments [member] | Coal [member] | Revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 8,889 | 7,578 | 4,518
Group and unallocated items/eliminations [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 1,244 | 876 | 713
Underlying EBITDA | (7) | (173) | (171)
Depreciation and amortisation | (242) | (252) | (247)
Impairment losses | (1) | (5) | (9)
Underlying EBIT | (250) | (430) | (427)
Exceptional items | (27) | (51) | (132)
Capital expenditure (cash basis) | 412 | 245 | 284
Profit/(loss) from equity accounted investments, related impairments and expenses | 1 |  | 1
Investments accounted for using the equity method | 6 | 5 | 6
Total assets | 37,766 | 41,760 | 41,606
Total liabilities | 37,000 | 41,456 | 46,427
Group and unallocated items/eliminations [member] | Revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | 1,332 | 977 | 853
Group and unallocated items/eliminations [member] | Inter-segment revenue [member] |  |  |
Disclosure of reportable segments [Line Items] |  |  |
Revenue | $ (88) | $ (101) | $ (140)

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