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Property, Plant and Equipment - Summary of Property, Plant and Equipment (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |
Property, plant and equipment acquired under finance lease | $ 6,644 | $ 5,312 |
Impairment charges related to Onshore US assets | 838 | 160 |
Property, plant and equipment acquired under finance lease [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |
Property, plant and equipment acquired under finance lease | 3 | 593 |
Impairment of Onshore US assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |
Impairment charges related to Onshore US assets | $ 520 |  |

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_v&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_98_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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- Details
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