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Related Party Transactions - Summary of Outstanding Balances and Transactions with Related Parties (Parenthetical) (Detail) $ in Thousands, shares in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 26, 2020 USD ($) | Feb. 01, 2014 | Dec. 31, 2020 PHP (₱) shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 PHP (₱) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 PHP (₱) | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($)
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 14, 18 and 25) |  |  | ₱ 21,555,000,000 |  | ₱ 20,007,000,000 |  | ₱ 14,331,000,000 |  |
Rent |  |  | 1,384,000,000 |  | 1,290,000,000 |  | 7,321,000,000 |  |
Accrued expenses and other current liabilities |  |  | 107,759,000,000 |  | 100,815,000,000 |  |  |  |
ROU assets |  |  | 18,303,000,000 |  | 15,890,000,000 |  |  |  |
Lease liabilities |  |  | 20,025,000,000 |  | 16,315,000,000 |  | 15,233,000,000 |  |
Outstanding Amounts |  |  | ₱ 222,765,000,000 |  | 192,556,000,000 |  |  | $ 25,000 |
Line of credit facility maturity date |  |  | Mar. 27, 2024 | Mar. 27, 2024 |  |  |  |  |
Line of credit facility amount outstanding |  |  | ₱ 1,201,000,000 | $ 25,000 | 1,270,000,000 | $ 25,000 |  |  |
Interest on loans and other related items – net (Note 5) |  |  | 8,736,000,000 |  | 7,275,000,000 |  | 6,783,000,000 |  |
Repairs and maintenance |  |  | 21,555,000,000 |  | 20,007,000,000 |  | 14,331,000,000 |  |
Professional and other contracted services (Note 25) |  |  | 7,307,000,000 |  | 7,408,000,000 |  | 12,809,000,000 |  |
Selling and promotions |  |  | 6,542,000,000 |  | 5,395,000,000 |  | 6,340,000,000 |  |
Depreciation and amortization (Notes 9 and 10) |  |  | 47,480,000,000 |  | 39,656,000,000 |  | 47,240,000,000 |  |
Selling and promotions, communication, training and travel, repairs and maintenance and professional and other contracted services |  |  | 1,041,000,000 |  | 1,045,000,000 |  | 1,138,000,000 |  |
Financing costs – net |  |  | 10,086,000,000 |  | 8,553,000,000 |  | 7,067,000,000 |  |
Insurance and security services |  |  | 1,699,000,000 |  | 1,671,000,000 |  | 1,499,000,000 |  |
Prepaid benefit costs |  |  | 76,766,000,000 |  | 60,231,000,000 |  |  |  |
Prepayments |  |  | 76,766,000,000 |  | 60,231,000,000 |  |  |  |
Accrued expenses and other current liabilities |  |  | 66,109,000,000 |  | 48,933,000,000 |  |  |  |
Cost of services |  |  | 12,295,000,000 |  | 13,429,000,000 |  | 14,427,000,000 |  |
OTHER INCOME (EXPENSES) – NET (Note 5) |  |  | (3,161,000,000) |  | (7,065,000,000) |  | 9,042,000,000 |  |
Accrued expenses |  |  | 102,000,000 |  | 102,000,000 |  |  |  |
Others |  |  | 2,504,000,000 |  | 2,508,000,000 |  |  |  |
Revenues |  |  | 181,004,000,000 |  | 169,187,000,000 |  | 162,914,000,000 |  |
Expenses |  |  | 144,822,000,000 |  | 129,786,000,000 |  | 149,141,000,000 |  |
Trade and other receivables |  |  | 38,304,000,000 |  | 39,340,000,000 |  |  |  |
Accounts payable |  |  | 82,413,000,000 |  | 77,845,000,000 |  |  |  |
Consolidated Income Statements |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 14, 18 and 25) |  |  | 139,000,000 |  | 169,000,000 |  | 17,000,000 |  |
Accrued expenses and other current liabilities |  |  | 183,000,000 |  | 147,000,000 |  |  |  |
Interest on loans and other related items – net (Note 5) |  |  | 29,500,000 |  | 51,500,000 |  | 50,000,000 |  |
Repairs and maintenance |  |  | 139,000,000 |  | 169,000,000 |  | 17,000,000 |  |
Meralco Joint Venture Through P C E V |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 14, 18 and 25) |  |  | 2,231,000,000 |  | 2,689,000,000 |  | 2,771,000,000 |  |
Accounts payable and accrued expenses and other current liabilities |  |  | 418,000,000 |  | 415,000,000 |  |  |  |
Fee expense |  |  | 473,000,000 |  | 218,000,000 |  |  |  |
Rent |  |  | 38,000,000 |  | 29,000,000 |  | 583,000,000 |  |
ROU assets |  |  | 1,916,000,000 |  |  |  |  |  |
Lease liabilities |  |  | 2,026,000,000 |  |  |  |  |  |
Repairs and maintenance |  |  | 2,231,000,000 |  | 2,689,000,000 |  | 2,771,000,000 |  |
Depreciation and amortization (Notes 9 and 10) |  |  | 473,000,000 |  | 218,000,000 |  |  |  |
Meralco Joint Venture Through P C E V | February 28, 2018 [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 14, 18 and 25) |  |  |  |  |  |  | 96,000 |  |
Accrued expenses and other current liabilities |  |  |  |  | 185,000 |  |  |  |
Construction-in-progress |  |  |  |  |  |  | 14,000,000 |  |
Repairs and maintenance |  |  |  |  |  |  | 96,000 |  |
Meralco Joint Venture Through P C E V | March 31, 2017 [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 14, 18 and 25) |  |  |  |  |  |  | 33,000,000 |  |
Accrued expenses and other current liabilities |  |  | ₱ 3,000,000 |  | 3,000,000 |  |  |  |
Construction-in-progress |  |  |  |  |  |  | 19,000,000 |  |
Repairs and maintenance |  |  |  |  |  |  | 33,000,000 |  |
Joint Venture Through P C E V |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  |  |  | 66,000 |  |  |  |
Director, Key Officer or Owner [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Percentage of outstanding common stock held in entity |  |  | 10.00% | 10.00% |  |  |  |  |
Parties Related to Members of Board of Directors and Senior Management [member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Percentage of outstanding common stock held in entity |  |  | 10.00% | 10.00% |  |  |  |  |
NTT Finance Corporation [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Outstanding Amounts | $ |  |  |  |  |  |  |  | 25,000 |
Line of credit facility maturity date |  |  | Mar. 30, 2023 | Mar. 30, 2023 |  |  |  |  |
Line of credit facility amount outstanding |  |  | ₱ 29,500,000 |  | 51,500,000 |  | 50,000,000 |  |
Amounts receivable |  |  | 1,201,000,000 |  | 1,270,000,000 |  |  | $ 25,000 | $ 25,000
NTT Communications [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses and other current liabilities |  |  | 11,000,000 |  | 10,000,000 |  |  |  |
Rent |  |  |  |  |  |  | 5,000,000 |  |
Accrued expenses and other current liabilities |  |  | 8,000,000 |  | 8,000,000 |  |  |  |
Professional and other contracted services (Note 25) |  |  | ₱ 81,000,000 |  | 95,000,000 |  | 95,000,000 |  |
Outstanding common stock held |  |  | 20.00% |  |  |  |  | 20.00% |
NTT Communications [Member] | Top of range [member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Restriction on ownership of shares percentage |  |  | 21.00% |  |  |  |  | 21.00% |
NTT Communications [Member] | Bottom of range [member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Outstanding common stock held |  |  | 17.50% |  |  |  |  | 17.50% |
NTT Communications [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Shares of entity transferred by related party | shares |  |  | 12.6 |  |  |  |  | 12.6 |
Conventional International Telecommunication [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses and other current liabilities |  |  | ₱ 3,000,000 |  | 2,000,000 |  |  |  |
Rent |  |  |  |  |  |  | 5,000,000 |  |
NTT Worldwide Telecommunications Corporation [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  | 1,000,000 |  | 3,000,000 |  |  |  |
Selling and promotions |  |  | 3,000,000 |  | 5,000,000 |  | 5,000,000 |  |
NTT DOCOMO, Inc. [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  | 8,000,000 |  | 6,000,000 |  |  |  |
Professional and other contracted services (Note 25) |  |  | 58,000,000 |  | 70,000,000 |  | 96,000,000 |  |
JGSHI and Subsidiaries [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 14, 18 and 25) |  |  | 6,000,000 |  | 38,000,000 |  | 111,000,000 |  |
Accounts payable and accrued expenses and other current liabilities |  |  | 62,000,000 |  | 33,000,000 |  |  |  |
Rent |  |  | 314,000,000 |  | 198,000,000 |  | 236,000,000 |  |
ROU assets |  |  | 134,000,000 |  | 168,000,000 |  |  |  |
Lease liabilities |  |  | 143,000,000 |  | 174,000,000 |  |  |  |
Repairs and maintenance |  |  | 6,000,000 |  | 38,000,000 |  | 111,000,000 |  |
Professional and other contracted services (Note 25) |  |  | 2,000,000 |  |  |  |  |  |
Depreciation and amortization (Notes 9 and 10) |  |  | 34,000,000 |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  | 59,000,000 |  | 31,000,000 |  |  |  |
Selling and promotions, communication, training and travel, repairs and maintenance and professional and other contracted services |  |  | 9,000,000 |  | 146,000,000 |  | 138,000,000 |  |
Financing costs – net |  |  | 13,000,000 |  |  |  |  |  |
JGSHI and Subsidiaries [Member] | Airfare, electricity, marketing expenses and bank fees [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  | 3,000,000 |  | 2,000,000 |  |  |  |
Malayan [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses and other current liabilities |  |  | 10,000,000 |  | 5,000,000 |  |  |  |
Accrued expenses and other current liabilities |  |  | 10,000,000 |  | 5,000,000 |  |  |  |
Insurance and security services |  |  | 194,000,000 |  | 295,000,000 |  | 182,000,000 |  |
Prepaid benefit costs |  |  | 18,000,000 |  | 19,000,000 |  |  |  |
Prepayments |  |  | 18,000,000 |  | 19,000,000 |  |  |  |
Malayan [Member] | Airfare, electricity, marketing expenses and bank fees [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Prepaid benefit costs |  |  | 18,000,000 |  | 19,000,000 |  |  |  |
Prepayments |  |  | 18,000,000 |  | 19,000,000 |  |  |  |
Gotuaco [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses and other current liabilities |  |  | 10,000,000 |  | 1,000,000 |  |  |  |
Insurance and security services |  |  | 149,000,000 |  | 165,000,000 |  | 163,000,000 |  |
Prepaid benefit costs |  |  | 5,000,000 |  | 6,000,000 |  |  |  |
Prepayments |  |  | 5,000,000 |  | 6,000,000 |  |  |  |
ALBV [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Professional and other contracted services (Note 25) |  |  | ₱ 72,000,000 |  | 156,000,000 |  | 135,000,000 |  |
Prepaid benefit costs |  |  |  |  |  |  | 34,000,000 |  |
Prepayments |  |  |  |  |  |  | 34,000,000 |  |
Technical service fees percentage |  | 0.40% | 0.50% | 0.50% |  |  |  |  |
Accrued expenses and other current liabilities |  |  |  |  | 0 |  |  |  |
Service fee |  |  | ₱ 250,000 |  |  |  |  |  |
Outstanding payable |  |  | ₱ 0 |  | 0 |  |  |  |
Reduction in service fee | $ | $ 100 |  |  |  |  |  |  |  |
NTT Communications and NTT Docomo [Member] | Common stock [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Percentage of ownership held by related party for terminating agreement |  |  | 10.00% |  |  |  |  | 10.00% |
First Pacific And Affiliates |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Percentage of ownership held by related party for terminating agreement |  |  | 18.50% |  |  |  |  | 18.50% |
Tv Five Network Inc [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Selling and promotions |  |  | ₱ 112,000,000 |  | 33,000,000 |  | 409,000,000 |  |
Prepaid benefit costs |  |  | 0 |  | 0 |  |  |  |
Prepayments |  |  | ₱ 0 |  | 0 |  |  |  |
Description Of Agreement Extension Period |  |  | 2015 to 2018 | 2015 to 2018 |  |  |  |  |
Tv Five Network Inc [Member] | Common stock [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Advertisement Agreement Period |  |  | 5 years | 5 years |  |  |  |  |
Cignal Cable [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  | ₱ 102,000,000 |  |  |  |  |  |
Outstanding Amounts |  |  | 0 |  | 0 |  |  |  |
Content cost recognized |  |  |  |  | 224,000,000 |  | 372,000,000 |  |
Iflix [Member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Selling and promotions |  |  | ₱ 23,000,000 |  | 82,000,000 |  |  |  |
Minimum guarantee committed for advertising spend | $ |  |  |  | $ 1,500 |  |  |  |  |
Percentage of marketing costs |  |  | 30.00% | 30.00% |  |  |  |  |
Marketing costs | $ |  |  |  | $ 500 |  |  |  |  |
Cost of services |  |  | ₱ 22,000,000 |  | 82,000,000 |  |  |  |
OTHER INCOME (EXPENSES) – NET (Note 5) |  |  | 51,000,000 |  | 166,000,000 |  |  |  |
Other related parties [member] |  |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  | 63,000,000 |  | 65,000,000 |  |  |  |
ROU assets |  |  | 598,000,000 |  | 232,000,000 |  |  |  |
Lease liabilities |  |  | 569,000,000 |  | 310,000,000 |  |  |  |
Revenues |  |  | 2,145,000,000 |  | 2,401,000,000 |  | 2,355,000,000 |  |
Expenses |  |  | 1,582,000,000 |  | 1,908,000,000 |  | ₱ 1,935,000,000 |  |
Trade and other receivables |  |  | 2,036,000,000 |  | 2,082,000,000 |  |  |  |
Accounts payable |  |  | ₱ 1,049,000,000 |  | ₱ 1,173,000,000 |  |  |  |

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