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Fair value measurements - Carrying amount and fair value (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Fair value measurements |  |
Carrying amount of derivative financial assets | $ 497,403 | $ 867,809
Fair value of derivative financial assets | 497,403 | 867,809
Net carrying amount | (2,979,339) | (1,134,516)
Net fair value | (2,984,338) | (1,134,780)
Transfers of assets from level 1 to level 2 | 0 | 0
Transfers of assets from level 2 to level 1 | 0 | 0
Transfers of liabilities from level 1 to level 2 | 0 | 0
Transfers of liabilities from level 2 to level 1 | 0 | 0
Financial debt |  |
Fair value measurements |  |
Carrying amount of financial liabilities | (3,476,742) | (1,988,181)
Fair value of financial liabilities | (3,481,741) | (1,988,445)
Interest-bearing loans and borrowings |  |
Fair value measurements |  |
Fair value of financial liabilities | (3,481,741) | (1,988,445)
Derivative financial instruments |  |
Fair value measurements |  |
Carrying amount of financial liabilities |  | (14,144)
Fair value of financial liabilities |  | (14,144)
Jet fuel Asian call options |  |
Fair value measurements |  |
Carrying amount of derivative financial assets | 497,403 | 867,809
Fair value of derivative financial assets | 497,403 | 867,809
Interest rate swap contracts |  |
Fair value measurements |  |
Fair value of financial liabilities |  | (14,144)
Level 2 |  |
Fair value measurements |  |
Net fair value | (2,984,338) | (1,134,780)
Level 2 | Interest-bearing loans and borrowings |  |
Fair value measurements |  |
Fair value of financial liabilities | (3,481,741) | (1,988,445)
Level 2 | Jet fuel Asian call options |  |
Fair value measurements |  |
Fair value of derivative financial assets | $ 497,403 | 867,809
Level 2 | Interest rate swap contracts |  |
Fair value measurements |  |
Fair value of financial liabilities |  | $ (14,144)

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35H&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35I&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35M&doctype=Standard -URIDate 2017-03-09 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35N -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35N&doctype=Standard -URIDate 2017-03-09 + Details
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