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Financial Assets and Liabilities - Summary of Carrying Amounts, by Maturity, of Financial Instruments that are Expected to Have Exposure on Interest Rate Risk (Detail) ₱ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019 PHP (₱)	Dec. 31, 2018 PHP (₱)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	₱ 63,671	₱ 95,747
Long-term Debt | ₱	372,490	332,771
Fair Value [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	13,196	16,272
Long-term Debt | ₱	7,964	7,942
Costs [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	80,873	112,486
Interest rate risk [member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 156,996	₱ 138,637	$ 3,090	$ 2,638
Interest rate risk [member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	—	—
Interest rate risk [member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 952	₱ 1,483	19	28
Interest rate risk [member] | Debt Instruments at Amortized Cost [Member] | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	150	150	3	3
Interest rate risk [member] | Cash In Bank | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	4,228	3,017	83	57
Interest rate risk [member] | Cash In Bank | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	1,586	1,580	31	30
Interest rate risk [member] | Cash In Bank | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	92	4	2
Interest rate risk [member] | Temporary Cash Investments | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	14,018	10,204	276	194
Interest rate risk [member] | Temporary Cash Investments | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	3,645	35,467	72	675
Interest rate risk [member] | Short Term Investments1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	24,033	51,587	474	982
Interest rate risk [member] | Short Term Investments1 | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	29	27	1	1
Interest rate risk [member] | Short Term Investments1 | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets		1,138		22
Interest rate risk [member] | Short Term Investments1 | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	285		6
Interest rate risk [member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 193,047	₱ 176,694	3,800	3,362
Interest rate risk [member] | Less than 1 year [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			42	234
Interest rate risk [member] | Less than 1 year [Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	4.4850	4.9110
Interest rate risk [member] | Less than 1 year [Member] | Philippine Peso [Member] | Top of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	5.5000	5.6038
Interest rate risk [member] | Less than 1 year [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt				$ 2
Fixed Rate		1.41%		1.41%
Interest rate risk [member] | Less than 1 year [Member] | Debt Instruments at Amortized Cost [Member] | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			3
Interest rate	4.8371%
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			83	$ 57
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | Philippine Peso [Member] | Bottom of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	0.05%	0.05%
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | Philippine Peso [Member] | Top of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	1.25%	1.25%
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			31	30
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | U.S. Dollars [Member] | Bottom of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	0.01%	0.01%
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | U.S. Dollars [Member] | Top of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	1.00%	0.25%
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			2
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | Other Currencies | Bottom of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	0.10%	0.10%
Interest rate risk [member] | Less than 1 year [Member] | Cash In Bank | Other Currencies | Top of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	0.50%	0.50%
Interest rate risk [member] | Less than 1 year [Member] | Temporary Cash Investments | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			276	194
Interest rate risk [member] | Less than 1 year [Member] | Temporary Cash Investments | Philippine Peso [Member] | Bottom of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	0.125%	0.25%
Interest rate risk [member] | Less than 1 year [Member] | Temporary Cash Investments | Philippine Peso [Member] | Top of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	5.00%	7.05%
Interest rate risk [member] | Less than 1 year [Member] | Temporary Cash Investments | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			72	675
Interest rate risk [member] | Less than 1 year [Member] | Temporary Cash Investments | U.S. Dollars [Member] | Bottom of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	0.70%	2.70%
Interest rate risk [member] | Less than 1 year [Member] | Temporary Cash Investments | U.S. Dollars [Member] | Top of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	4.75%	3.00%
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			474	979
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1 | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			1	1
Interest rate		3.50%
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1 | Philippine Peso [Member] | Bottom of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	1.50%
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1 | Philippine Peso [Member] | Top of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	3.00%
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1 | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets				22
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1 | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets			6
Interest rate	0.00%
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1 | Other Currencies | Bottom of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate		2.50%
Interest rate risk [member] | Less than 1 year [Member] | Short Term Investments1 | Other Currencies | Top of range [member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate		3.00%
Interest rate risk [member] | Less than 1 year [Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			300	253
Interest rate risk [member] | 1-2 years [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			376	123
Interest rate risk [member] | 1-2 years [Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	3.9000	3.9000
Interest rate risk [member] | 1-2 years [Member] | Philippine Peso [Member] | Top of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	6.7339	6.7339
Interest rate risk [member] | 1-2 years [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			$ 15	$ 15
Fixed Rate	2.885%	2.885%	2.885%	2.885%
Interest rate risk [member] | 1-2 years [Member] | Debt Instruments at Amortized Cost [Member] | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets				$ 3
Interest rate		4.8371%
Interest rate risk [member] | 1-2 years [Member] | Short Term Investments1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets				3
Interest rate risk [member] | 1-2 years [Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			$ 536	518
Interest rate risk [member] | 2022 [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			302	319
Interest rate risk [member] | 2022 [Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	3.9000	3.9000
Interest rate risk [member] | 2022 [Member] | Philippine Peso [Member] | Top of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	6.7339	6.7339
Interest rate risk [member] | 2022 [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			$ 4	$ 7
Fixed Rate	2.885%	2.885%	2.885%	2.885%
Interest rate risk [member] | 2022 [Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			$ 335	$ 428
Interest rate risk [member] | 3-5 years [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			673	730
Interest rate risk [member] | 3-5 years [Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	3.9000	3.9000
Interest rate risk [member] | 3-5 years [Member] | Philippine Peso [Member] | Top of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	6.7339	6.7339
Interest rate risk [member] | 3-5 years [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt				$ 4
Fixed Rate		2.885%		2.885%
Interest rate risk [member] | 3-5 years [Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			793	$ 788
Interest rate risk [member] | More than 5 years [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			1,697	1,232
Interest rate risk [member] | More than 5 years [Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	4.2500	4.2500
Interest rate risk [member] | More than 5 years [Member] | Philippine Peso [Member] | Top of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	6.7339	6.7339
Interest rate risk [member] | More than 5 years [Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			1,836	1,375
Interest rate risk [member] | Floating interest rate [member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 18,975	₱ 14,610	374	278
Interest rate	—	—
Interest rate risk [member] | Floating interest rate [member] | Less than 1 year [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			93
Interest rate	1.0000% over PHP BVAL	—
Interest rate risk [member] | Floating interest rate [member] | 1-2 years [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			69	94
Interest rate	0.5000% to 1.0000% over PHP BVAL	0.5000% to 1.0000% over PHP BVAL
Interest rate risk [member] | Floating interest rate [member] | 2022 [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			3	64
Interest rate	0.5000% to 0.6000% over PHP BVAL	0.5000% to 1.0000% over PHP BVAL
Interest rate risk [member] | Floating interest rate [member] | 3-5 years [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			70	2
Interest rate	0.5000% to 0.6000% over PHP BVAL	0.5000% to 0.6000% over PHP BVAL
Interest rate risk [member] | Floating interest rate [member] | More than 5 years [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			139	118
Interest rate	0.6000% over PHP BVAL	0.5000% to 0.6000% over PHP BVAL
Interest rate risk [member] | Fair Value [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 153,644	₱ 121,868	3,024	2,319
Interest rate risk [member] | Fair Value [Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	—	—
Interest rate risk [member] | Fair Value [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 945	₱ 1,502	19	28
Interest rate risk [member] | Fair Value [Member] | Debt Instruments at Amortized Cost [Member] | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	150	148	3	3
Interest rate risk [member] | Fair Value [Member] | Cash In Bank | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	4,228	3,017	83	57
Interest rate risk [member] | Fair Value [Member] | Cash In Bank | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	1,586	1,580	31	30
Interest rate risk [member] | Fair Value [Member] | Cash In Bank | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	92	4	2
Interest rate risk [member] | Fair Value [Member] | Temporary Cash Investments | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	14,018	10,204	276	194
Interest rate risk [member] | Fair Value [Member] | Temporary Cash Investments | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	3,645	35,467	72	675
Interest rate risk [member] | Fair Value [Member] | Short Term Investments1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	24,033	51,585	474	982
Interest rate risk [member] | Fair Value [Member] | Short Term Investments1 | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	29	27	1	1
Interest rate risk [member] | Fair Value [Member] | Short Term Investments1 | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets		1,138		22
Interest rate risk [member] | Fair Value [Member] | Short Term Investments1 | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets	285		6
Interest rate risk [member] | Fair Value [Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	189,687	159,945	3,734	3,043
Interest rate risk [member] | Fair Value [Member] | Floating interest rate [member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 18,975	₱ 14,610	374	278
Interest rate	—	—
Interest rate risk [member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 16,124	₱ 21,964	317	418
Interest rate	—	—
Interest rate risk [member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | Less than 1 year [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			165	17
Interest rate	0.7900% to 1.4500% over LIBOR	0.9500% to 1.1000% over LIBOR
Interest rate risk [member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | 1-2 years [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			76	286
Interest rate	0.7900% to 0.9500% over LIBOR	0.7900% to 1.4500% over LIBOR
Interest rate risk [member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | 2022 [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			26	38
Interest rate	0.7900% to 0.9500% over LIBOR	0.7900% to 0.9500% over LIBOR
Interest rate risk [member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | 3-5 years [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt			50	52
Interest rate	1.0500% over LIBOR	0.7900% to 1.0500% over LIBOR
Interest rate risk [member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | More than 5 years [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt				25
Interest rate	—	1.0500% over LIBOR
Interest rate risk [member] | U.S. Dollar Debts [Member] | Fair Value [Member] | Floating interest rate [member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt	₱ 16,123	₱ 21,965	$ 317	$ 418
Interest rate	—	—
Interest rate risk [member] | Debt Issuance ​Cost [​Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 408	₱ 278
Interest rate risk [member] | Debt Issuance ​Cost [​Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	—	—
Interest rate risk [member] | Debt Issuance ​Cost [​Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱		₱ 1
Interest rate risk [member] | Debt Issuance ​Cost [​Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 491	418
Interest rate risk [member] | Debt Issuance ​Cost [​Member] | Floating interest rate [member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 36	₱ 45
Interest rate	—	—
Interest rate risk [member] | Debt Issuance ​Cost [​Member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 47	₱ 94
Interest rate	—	—
Interest rate risk [member] | Costs [Member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 156,588	₱ 138,359
Interest rate risk [member] | Costs [Member] | Philippine Peso [Member] | Bottom of range [member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Interest rate	—	—
Interest rate risk [member] | Costs [Member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 952	₱ 1,482
Interest rate risk [member] | Costs [Member] | Debt Instruments at Amortized Cost [Member] | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	150	150
Interest rate risk [member] | Costs [Member] | Cash In Bank | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	4,228	3,017
Interest rate risk [member] | Costs [Member] | Cash In Bank | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	1,586	1,580
Interest rate risk [member] | Costs [Member] | Cash In Bank | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	92	4
Interest rate risk [member] | Costs [Member] | Temporary Cash Investments | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	14,018	10,204
Interest rate risk [member] | Costs [Member] | Temporary Cash Investments | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	3,645	35,467
Interest rate risk [member] | Costs [Member] | Short Term Investments1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	24,033	51,587
Interest rate risk [member] | Costs [Member] | Short Term Investments1 | Philippine Peso [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	29	27
Interest rate risk [member] | Costs [Member] | Short Term Investments1 | U.S. Dollars [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱		1,138
Interest rate risk [member] | Costs [Member] | Short Term Investments1 | Other Currencies
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Total assets | ₱	285
Interest rate risk [member] | Costs [Member] | Total Assets Excluding Short Term Investments [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	192,556	176,276
Interest rate risk [member] | Costs [Member] | Floating interest rate [member] | Philippine Peso [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 18,939	₱ 14,565
Interest rate	—	—
Interest rate risk [member] | Costs [Member] | U.S. Dollar Debts [Member] | Floating interest rate [member] | U.S. Dollars [Member] | Long Term Debt1
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Long-term Debt | ₱	₱ 16,077	₱ 21,870
Interest rate	—	—

X

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
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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 amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) 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 deliver 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, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are 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. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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