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Hybrid Bonds - Summary of Hybrid Bonds (Parenthetical) (Detail) - Private hybrid bonds [Member]
12 Months Ended
Dec. 31, 2022
After 10 years [Member]  
Annual interest rate, additional premium 0.25%
Annual interest rate, additional premium period 10 years
After 25 years [Member]  
Annual interest rate, additional premium 0.75%
Annual interest rate, additional premium period 25 years