Amount Due From/To Ultimate Holding Company - Additional Information (Detail) - CNY (¥) ¥ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of transactions between related parties [line items]
Amount due to ultimate holding company	¥ 21,677	¥ 11,020
China Mobile Finance [member]
Disclosure of transactions between related parties [line items]
Amount due to ultimate holding company	¥ 21,637	¥ 10,873

The amount of current payables due to related parties. [Refer: Related parties [member]; Payables to related parties]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 78
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant