Contingent Liabilities - Additional Information (Detail) - Pilot trainees [member] - CNY (¥) ¥ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Disclosure of contingent liabilities [line items]
Guarantees provided on personal bank loans	¥ 696,000	¥ 696,000
Personal bank loans drawn under guarantees	275,000	318,000
Amount paid to banks due to default of payments	¥ 0	¥ 1,000

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.

No definition available.

Name:	ifrs-full_DisclosureOfContingentLiabilitiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration