Aircraft and Transportation Service Expenses - Summary of Aircraft and Transportation Service Expenses (Detail) - CNY (¥) ¥ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Analysis of income and expense [abstract]
Landing and navigation fees	¥ 17,658	¥ 15,980	¥ 14,910
Ground service and other charges	8,933	8,399	8,025
Airport and transportation service expenses	¥ 26,591	¥ 24,379	¥ 22,935

The amount of expense arising from transportation services.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2019-03-27

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration