COMMITMENTS AND CONTINGENT LIABILITIES - Additional Information (Detail) - 12 months ended Dec. 31, 2023 $ in Millions, ¥ in Billions	JPY (¥) agreements	USD ($) agreements
Commitments and Contingencies Disclosure [Line Items]
Number of operating service agreements, technology and consulting	2	2
Number of operating service agreements, information technology and data services	2	2
Technology and consulting company mainframe and server computer operations and support
Commitments and Contingencies Disclosure [Line Items]
Outsourcing agreements, remaining term	1 year	1 year
Outsourcing agreements, aggregate remaining cost	¥ 10.5	$ 74
Technology and consulting company application maintenance and development services
Commitments and Contingencies Disclosure [Line Items]
Outsourcing agreements, remaining term	1 year	1 year
Outsourcing agreements, aggregate remaining cost	¥ 0.4	$ 3
Management consulting and technology services company application maintenance and development services
Commitments and Contingencies Disclosure [Line Items]
Outsourcing agreements, remaining term	5 years	5 years
Outsourcing agreements, aggregate remaining cost	¥ 18.3	$ 129
Information technology and data services company application maintenance and development services first agreement
Commitments and Contingencies Disclosure [Line Items]
Outsourcing agreements, remaining term	2 years	2 years
Outsourcing agreements, aggregate remaining cost	¥ 3.3	$ 24
Information technology and data services company application maintenance and development services second agreement
Commitments and Contingencies Disclosure [Line Items]
Outsourcing agreements, remaining term	2 years	2 years
Outsourcing agreements, aggregate remaining cost	¥ 4.6	$ 32
Information technology and data services company enterprise software licensing
Commitments and Contingencies Disclosure [Line Items]
Outsourcing agreements, remaining term	1 year	1 year
Outsourcing agreements, aggregate remaining cost	¥ 1.4	$ 10
Information technology and software company application maintenance and development services
Commitments and Contingencies Disclosure [Line Items]
Outsourcing agreements, remaining term	2 years	2 years
Outsourcing agreements, aggregate remaining cost	¥ 1.8	$ 12