XML 33 R14.htm IDEA: XBRL DOCUMENT
v3.19.1

Credit Risk Management for Investments in Debt Instruments - 2018 | 12 Months Ended
--- | ---
Dec. 31, 2018
Text block [abstract] |
Credit Risk Management for Investments in Debt Instruments - 2018 |
| 9. | CREDIT RISK MANAGEMENT FOR INVESTMENTS IN DEBT INSTRUMENTS- 2018
The Group’s investment in unsecured subordinate corporate bonds is rated the equivalent of investment grade or higher and has low credit risk for the purpose of impairment assessment. There was no significant increase in credit risk of such debt instrument since initial recognition leading to changes in interest rates and terms, and there was also no significant change in bond issuer’s operation affecting the ability performing debt obligation. We evaluated that no expected credit losses existed. The Group reviews changes in bond yields and other public information periodically and makes an assessment whether there has been a significant increase in lifetime ECL since initial recognition.

X
- Definition Credit risk management for investments in debt instruments. + References No definition available. + Details
Name: | asx_CreditRiskManagementInvestmentsInDebtInstrumentsExplanatory
Namespace Prefix: | asx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Text block [abstract] + References No definition available. + Details
Name: | asx_TextBlockAbstract
Namespace Prefix: | asx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration