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Financial Assets and Liabilities - Summary of Future Minimum Lease Commitments Payable with Non-cancellable Operating Leases (Detail) - PHP (₱) ₱ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Of Operating Lease By Lessee [Line Items] |  |
Future minimum lease commitments payable with non-cancellable operating leases | ₱ 29,312 | ₱ 25,465
Within 12 months [Member] |  |
Disclosure Of Operating Lease By Lessee [Line Items] |  |
Future minimum lease commitments payable with non-cancellable operating leases | 11,061 | 10,480
Later than one year and not later than five years [Member] |  |
Disclosure Of Operating Lease By Lessee [Line Items] |  |
Future minimum lease commitments payable with non-cancellable operating leases | 13,899 | 11,258
More than 5 years [Member] |  |
Disclosure Of Operating Lease By Lessee [Line Items] |  |
Future minimum lease commitments payable with non-cancellable operating leases | ₱ 4,352 | ₱ 3,727

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