FAIR VALUE MEASUREMENTS - Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Level 3 MSRs (Detail) - Fair Value, Measurements, Recurring - Level 3	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Mortgage Servicing Rights | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Cost to service	$ 86	$ 90
Mortgage Servicing Rights | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Cost to service	118	103
Mortgage Servicing Rights | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Cost to service	$ 95	96
Interests in MSR | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Cost to service		78
Interests in MSR | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Cost to service		84
Interests in MSR | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Cost to service		$ 81
Discount rate | Mortgage Servicing Rights | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.084	0.033
Discount rate | Mortgage Servicing Rights | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.107	0.111
Discount rate | Mortgage Servicing Rights | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.097	0.070
Discount rate | Interests in MSR | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.084
Discount rate | Interests in MSR | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.084
Discount rate | Interests in MSR | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.084
Prepayment rate | Mortgage Servicing Rights | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.048	0.073
Prepayment rate | Mortgage Servicing Rights | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.081	0.159
Prepayment rate | Mortgage Servicing Rights | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.054	0.094
Prepayment rate | Interests in MSR | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.050
Prepayment rate | Interests in MSR | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.144
Prepayment rate | Interests in MSR | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.091
Delinquency rate | Mortgage Servicing Rights | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.002	0.002
Delinquency rate | Mortgage Servicing Rights | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.045	0.025
Delinquency rate | Mortgage Servicing Rights | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs	0.013	0.012
Delinquency rate | Interests in MSR | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.000
Delinquency rate | Interests in MSR | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.002
Delinquency rate | Interests in MSR | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
MSR measurement inputs		0.001