Risk Management - Changes in Level 3 Assets (Detail) - CNY (¥) ¥ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Changes in fair value measurement assets [line items]
Opening balance	¥ 4,516,551
Closing balance	4,862,767	¥ 4,516,551
Fair value [member]
Changes in fair value measurement assets [line items]
Opening balance	1,615,779
Closing balance	1,944,764	1,615,779
Significant unobservable inputs Level 3 [member] \| Fair value [member]
Changes in fair value measurement assets [line items]
Opening balance	349,127	293,924
Purchases	96,946	71,076
Transfer into Level 3		36
Transferred out of Level 3	(10)
Total gains/(losses) recorded in profit or loss	(1,532)
Total gains/(losses) recorded in other comprehensive income	(1,997)	1,861
Disposals or exercises	(11,378)	(2,876)
Maturity	(35,003)	(14,894)
Closing balance	396,153	349,127
Available-for-sale securities [member] \| Significant unobservable inputs Level 3 [member] \| Debt securities [member] \| Fair value [member]
Changes in fair value measurement assets [line items]
Opening balance	160,499	143,905
Purchases	49,497	27,415
Transferred out of Level 3	(10)
Total gains/(losses) recorded in other comprehensive income	(1,829)	4,073
Disposals or exercises	(600)
Maturity	(34,255)	(14,894)
Closing balance	173,302	160,499
Available-for-sale securities [member] \| Significant unobservable inputs Level 3 [member] \| Equity securities [member] \| Fair value [member]
Changes in fair value measurement assets [line items]
Opening balance	188,583	150,010
Purchases	44,778	43,661
Total gains/(losses) recorded in profit or loss	(1,714)
Total gains/(losses) recorded in other comprehensive income	(168)	(2,212)
Disposals or exercises	(10,778)	(2,876)
Closing balance	220,701	188,583
Securities at fair value through profit or loss [member] \| Significant unobservable inputs Level 3 [member] \| Debt securities [member] \| Fair value [member]
Changes in fair value measurement assets [line items]
Opening balance	45	9
Purchases	2,671
Transfer into Level 3		36
Total gains/(losses) recorded in profit or loss	182
Maturity	(748)
Closing balance	¥ 2,150	¥ 45

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]

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The gains (losses) including exchange differences recognised in other comprehensive income on the fair value measurement of assets. [Refer: At fair value [member]; Other comprehensive income]

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