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Related Party Transactions - Summary of Outstanding Balances and Transactions with Related Parties (Parenthetical) (Detail) shares in Millions, $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 PHP (₱) shares | Dec. 31, 2018 USD ($) | Dec. 31, 2017 PHP (₱) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 PHP (₱) | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) | Jan. 31, 2017 USD ($)
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 13, 17 and 24) | ₱ 14,331,000,000 |  | ₱ 12,744,000,000 |  | ₱ 14,706,000,000 |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 95,724,000,000 |  | 90,740,000,000 |  |  |  |  |
Total lease expense | 7,321,000,000 |  | 7,016,000,000 |  | 6,632,000,000 |  |  |
Outstanding Amounts | ₱ 176,276,000,000 |  | 172,611,000,000 |  |  |  |  | $ 25
Line of credit facility maturity date | Mar. 27, 2024 | Mar. 27, 2024 |  |  |  |  |  |
Line of credit facility amount outstanding | ₱ 1,314,000,000 | $ 25 | 1,249,000,000 | $ 25 |  |  |  |
Interest on loans and other related items – net (Note 5) | 6,783,000,000 |  | 7,014,000,000 |  | 6,956,000,000 |  |  |
Professional and other contracted services (Note 24) | 12,809,000,000 |  | 12,168,000,000 |  | 9,386,000,000 |  |  |
Selling and promotions (Note 24) | 6,340,000,000 |  | 5,908,000,000 |  | 7,687,000,000 |  |  |
Other expenses | 1,138,000,000 |  | 882,000,000 |  | 1,161,000,000 |  |  |
Insurance and security services | 1,499,000,000 |  | 1,519,000,000 |  | 1,736,000,000 |  |  |
Prepayments | 14,015,000,000 |  | 15,003,000,000 |  |  |  |  |
Prepayments – net of current portion (Note 18) | 6,255,000,000 |  | 5,370,000,000 |  |  |  |  |
Revenues | 164,752,000,000 |  | 159,926,000,000 |  | 165,262,000,000 |  |  |
Expenses | 150,979,000,000 |  | 150,415,000,000 |  | 140,559,000,000 |  |  |
Trade and other receivables | 40,559,000,000 |  | 48,262,000,000 |  |  |  |  |
Accounts payable (Note 22) | 74,610,000,000 |  | 60,445,000,000 |  |  |  |  |
Consolidated income statements [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Interest on loans and other related items – net (Note 5) | 50,000,000 |  | 28,000,000 |  |  |  |  |
Meralco Joint Venture Through P C E V |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 13, 17 and 24) | 2,771,000,000 |  | 2,397,000,000 |  | 2,401,000,000 |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 518,000,000 |  | 653,000,000 |  |  |  |  |
Total lease expense | 583,000,000 |  | 298,000,000 |  | 272,000,000 |  |  |
Meralco Joint Venture Through P C E V | February 28, 2018 [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 13, 17 and 24) | 96,000 |  | 3,000,000 |  | 32,000,000 |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 185,000 |  | 165,000 |  |  |  |  |
Construction-in-progress | 14,000,000 |  | 5,000,000 |  | 4,000,000 |  |  |
Meralco Joint Venture Through P C E V | March 31, 2017 [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 13, 17 and 24) | 33,000,000 |  | 114,000,000 |  | 112,000,000 |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 3,000,000 |  |  |  |  |  |  |
Construction-in-progress | 19,000,000 |  | 76,000,000 |  | 63,000,000 |  |  |
Joint Venture Through P C E V |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | ₱ 209,000,000 |  | 5,000,000 |  |  |  |  |
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 |  |
Line of credit facility maturity date | Mar. 30, 2023 | Mar. 30, 2023 |  |  |  |  |  |
Line of credit facility amount outstanding | ₱ 50,000,000 |  | 28,000,000 |  | 9,500,000 |  |  |
Amounts receivable | 1,314,000,000 |  | 1,249,000,000 |  |  | $ 25 | $ 25 |
NTT World Engineering Marine Corporation [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 13, 17 and 24) | 17,000,000 |  | 47,000,000 |  | 18,000,000 |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 84,000,000 |  | 33,000,000 |  |  |  |  |
NTT Communications Corporation [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 16,000,000 |  | 7,000,000 |  |  |  |  |
Professional and other contracted services (Note 24) | 95,000,000 |  | 88,000,000 |  | 77,000,000 |  |  |
Conventional International Telecommunication [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 4,000,000 |  | 2,000,000 |  |  |  |  |
Total lease expense | 5,000,000 |  | 4,000,000 |  | 7,000,000 |  |  |
NTT Worldwide Telecommunications Corporation [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 3,000,000 |  | 6,000,000 |  |  |  |  |
Selling and promotions (Note 24) | 5,000,000 |  | 8,000,000 |  | 10,000,000 |  |  |
NTT DOCOMO, Inc. [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 12,000,000 |  | 11,000,000 |  |  |  |  |
Professional and other contracted services (Note 24) | 96,000,000 |  | 94,000,000 |  | 95,000,000 |  |  |
JGSHI and Subsidiaries [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Repairs and maintenance (Notes 13, 17 and 24) | 111,000,000 |  | 69,000,000 |  | 57,000,000 |  |  |
Total lease expense | 236,000,000 |  | 118,000,000 |  | 125,000,000 |  |  |
Accounts payable, accrued liabilities and other current liabilities | 10,000,000 |  | 5,000,000 |  |  |  |  |
Other expenses | 138,000,000 |  | 71,000,000 |  | 59,000,000 |  |  |
JGSHI and Subsidiaries [Member] | Airfare, electricity, marketing expenses and bank fees [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accounts payable, accrued liabilities and other current liabilities | 3,000,000 |  | 6,000,000 |  |  |  |  |
Malayan [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 6,000,000 |  | 11,000,000 |  |  |  |  |
Insurance and security services | 182,000,000 |  | 179,000,000 |  | 242,000,000 |  |  |
Prepayments | 19,000,000 |  | 66,000,000 |  |  |  |  |
Prepayments – net of current portion (Note 18) | 6,000,000 |  | 11,000,000 |  |  |  |  |
Gotuaco [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 5,000,000 |  | 15,000,000 |  |  |  |  |
Insurance and security services | 163,000,000 |  | 126,000,000 |  | 156,000,000 |  |  |
Prepayments |  |  | 12,000,000 |  |  |  |  |
Prepayments – net of current portion (Note 18) | 5,000,000 |  | 15,000,000 |  |  |  |  |
ALBV [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 0 |  | 0 |  |  |  |  |
Professional and other contracted services (Note 24) | ₱ 34,000,000 |  | 190,000,000 |  | 183,000,000 |  |  |
Payment of technical service fees equivalent to rate of consolidated net revenue | 0.50% | 0.50% |  |  |  |  |  |
FPIML [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Professional and other contracted services (Note 24) | ₱ 135,000,000 |  |  |  |  |  |  |
service fee | 250,000,000 |  |  |  |  |  |  |
NTT Communications [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 20,000,000 |  | 9,000,000 |  |  |  |  |
Total lease expense | 5,000,000 |  | 4,000,000 |  | 7,000,000 |  |  |
Professional and other contracted services (Note 24) | ₱ 95,000,000 |  | 88,000,000 |  | 77,000,000 |  |  |
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 |  |
NTT Communications and NTT Docomo [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Outstanding common stock held | 20.00% |  |  |  |  | 20.00% |  |
NTT Communications and NTT Docomo [Member] | Stock Purchase And Strategic Investment Agreement [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Percentage of ownership held by related party for terminating agreement | 10.00% |  |  |  |  | 10.00% |  |
NTT Communications and NTT Docomo [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 and NTT Docomo [Member] | Bottom Of Range [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Outstanding common stock held | 17.50% |  |  |  |  | 17.50% |  |
First Pacific And Affiliates [Member] |  |  |  |  |  |  |  |
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 (Note 24) | ₱ 409,000,000 |  | 149,000,000 |  | 126,000,000 |  |  |
Prepayments |  |  | 277,000,000 |  |  |  | $ 277 |
Advertisement Agreement Period | 5 years | 5 years |  |  |  |  |  |
Description Of Agreement Extension Period | 2015 to 2018 | 2015 to 2018 |  |  |  |  |  |
Dakila Cable Tv Corporation |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Outstanding Amounts | ₱ 169,000,000 |  | 125,000,000 |  |  |  |  |
Content cost recognized | 372,000,000 |  | 514,000,000 |  | 116,000,000 |  |  |
Others [Member] |  |  |  |  |  |  |  |
Disclosure Of Transactions Between Related Parties [Line Items] |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities (Notes 23 and 26) | 9,000,000 |  | 35,000,000 |  |  |  |  |
Revenues | 2,355,000,000 |  | 2,059,000,000 |  | 781,000,000 |  |  |
Expenses | 1,935,000,000 |  | 1,223,000,000 |  | ₱ 1,113,000,000 |  |  |
Trade and other receivables | 2,094,000,000 |  | 1,867,000,000 |  |  |  |  |
Accounts payable (Note 22) | ₱ 684,000,000 |  | ₱ 365,000,000 |  |  |  |  |

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