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Additional disclosure items G.2.2. Lease commitments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of finance lease and operating lease by lessee [line items] |  |  |
Minimum operating lease payments recognised as expense | $ 155 | $ 155 | $ 159
Minimum lease payments payable under non-cancellable operating lease | 800 | 759 |
Minimum finance lease payments payable | 914 | 978 |
Finance lease liabilities | 353 | 365 |
Interest expense on finance leases | 92 | 65 | 48
1 year |  |  |
Disclosure of finance lease and operating lease by lessee [line items] |  |  |
Minimum lease payments payable under non-cancellable operating lease | 127 | 130 |
Minimum finance lease payments payable | 99 | 97 |
1 to 5 years |  |  |
Disclosure of finance lease and operating lease by lessee [line items] |  |  |
Minimum lease payments payable under non-cancellable operating lease | 412 | 372 |
Minimum finance lease payments payable | 400 | 404 |
Greater than 5 years |  |  |
Disclosure of finance lease and operating lease by lessee [line items] |  |  |
Minimum lease payments payable under non-cancellable operating lease | 262 | 258 |
Minimum finance lease payments payable | 415 | 477 |
Joint ventures |  |  |
Disclosure of finance lease and operating lease by lessee [line items] |  |  |
Minimum lease payments payable under non-cancellable operating lease | 312 | 194 | $ 210
Minimum finance lease payments payable | $ 1 | $ 5 |

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- Definition The amount of liabilities related to finance leases. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2019-01-01 -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-02&anchor=para_55&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount of interest expense on finance leases. [Refer: Interest expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2019-01-01 -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-02&anchor=para_112_c&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount of payments over the finance lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with any amounts guaranteed by the lessee or by a party related to the lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 31 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_31_b&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 35 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_35_a&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The portion of operating lease payments that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with any amounts guaranteed by the lessee or by a party related to the lessee recognised as an expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 35 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_35_c&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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