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Income Tax - Imputation Credit Account (Detail) $ in Millions	Dec. 31, 2016 TWD ($)
Major Components Of Tax Expense Income [Abstract]
Balance of Imputation Credit Account (“ICA”)	$ 7,691

X

- References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

The amount of regulatory deferral account credit balances. [Refer: Regulatory deferral account balances [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 14
-IssueDate 2016-01-13
-Paragraph 20
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=14&date=2016-03-30&anchor=para_20_b&doctype=Standard
-URIDate 2016-03-31

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 14
-IssueDate 2016-01-13
-Paragraph 33
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=14&date=2016-03-30&anchor=para_33_a&doctype=Standard
-URIDate 2016-03-31

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 14
-IssueDate 2016-01-13
-Paragraph 35
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=14&date=2016-03-30&anchor=para_35&doctype=Standard
-URIDate 2016-03-31

+ Details

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Balance Type:	credit
Period Type:	instant