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Financial Assets and Liabilities - Summary of Maximum Exposure to Credit Risk of Financial Assets Subject to Impairment (Detail) - PHP (₱)
₱ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Less allowance ₱ 17,475 ₱ 17,657
Carrying amount 46,111 46,781
Costs [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 63,586 64,438
High Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 25,729 31,494
Standard Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 5,926 3,954
Substandard Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 14,456 11,333
Default [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 17,475 17,657
Stage 1 12-Month ECL [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Less allowance 279 442
Carrying amount 14,499 20,695
Stage 1 12-Month ECL [Member] | Costs [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 14,778 21,137
Stage 1 12-Month ECL [Member] | High Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 14,059 20,424
Stage 1 12-Month ECL [Member] | Standard Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 440 271
Stage 1 12-Month ECL [Member] | Default [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 279 442
Stage 2 Lifetime ECL [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Less allowance 3,596 4,190
Carrying amount 31,612 26,086
Stage 2 Lifetime ECL [Member] | Costs [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 35,208 30,276
Stage 2 Lifetime ECL [Member] | High Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 11,670 11,070
Stage 2 Lifetime ECL [Member] | Standard Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 5,486 3,683
Stage 2 Lifetime ECL [Member] | Substandard Grade [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 14,456 11,333
Stage 2 Lifetime ECL [Member] | Default [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 3,596 4,190
Stage 3 Lifetime ECL [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Less allowance 13,600 13,025
Stage 3 Lifetime ECL [Member] | Costs [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure 13,600 13,025
Stage 3 Lifetime ECL [Member] | Default [Member]    
Disclosure Of Reconciliation Of Changes In Loss Allowance And Explanation Of Changes In Gross Carrying Amount For Financial Instruments [Line Items]    
Credit exposure ₱ 13,600 ₱ 13,025