v3.24.1

Share-based Payment Arrangements - Summary of USISH's outstanding share options balance sheet (Detail)	12 Months Ended
	Dec. 31, 2023 ¥ / shares	Dec. 31, 2022 ¥ / shares	Dec. 31, 2023 $ / shares	Dec. 31, 2022 $ / shares
USISH Option Plans [member] | Share options [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Price Per Share	¥ 15.5	¥ 15.5
Weighted average remaining contractual life of outstanding share options	1 year 10 months 24 days	2 years 10 months 24 days
USISH Option Plans [member] | Stock option plans [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Price Per Share	¥ 12	¥ 12.4
Weighted average remaining contractual life of outstanding share options	10 months 24 days	1 year 10 months 24 days
USISH Option Plans [member] | 2020 Share Options [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Price Per Share	¥ 20.5	¥ 20.9
Weighted average remaining contractual life of outstanding share options	10 months 24 days	1 year 10 months 24 days
USISH Option Plans [member] | 2023 share options [member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Price Per Share	¥ 14.5
Weighted average remaining contractual life of outstanding share options	2 years 9 months 18 days
AMPI Option Plans [Member] | 2022 share options [member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Range of Exercise Price Per Share | $ / shares			$ 30	$ 30
Weighted average remaining contractual life of outstanding share options	8 years 3 months 18 days	9 years 3 months 18 days

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

X

- Definition

The exercise price of outstanding share options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
-Paragraph 45
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45_d&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_ExercisePriceOfOutstandingShareOptions2019
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
-Paragraph 45
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45_d&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=asx_USISHOptionPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	asx_PlanNameAxis=ifrs-full_ShareOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	asx_PlanNameAxis=asx_StockOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	asx_PlanNameAxis=asx_TwoThousandAndTwentyShareOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	asx_PlanNameAxis=asx_TwoThousandAndTwentyThreeShareOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=asx_AmpiOptionPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	asx_PlanNameAxis=asx_TwoThousandAndTwentyTwoShareOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: