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v3.8.0.1

Guarantor Statements - Additional Information (Detail) - USD ($) $ in Billions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Notes [Member] |  |  |
Supplemental Guarantor Information [line items] |  |  |
Borrowings outstanding amount | $ 8.9 | $ 6.3 | $ 5.6
Notes [Member] | Bottom of range [member] |  |  |
Supplemental Guarantor Information [line items] |  |  |
Interest rate of borrowings | 1.375% |  |
Notes [Member] | Top of range [member] |  |  |
Supplemental Guarantor Information [line items] |  |  |
Interest rate of borrowings | 5.90% |  |
UCC and UNUS [Member] |  |  |
Supplemental Guarantor Information [line items] |  |  |
Ownership percentage | 100.00% |  |

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_7&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition Percentage of ownership by parent entities + References No definition available. + Details
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- Definition Supplemental guarantor information. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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