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COMMITMENTS AND CONTINGENT LIABILITIES - Additional Information (Detail) - 12 months ended Dec. 31, 2024 $ in Millions, ¥ in Billions | JPY (¥) agreements | USD ($) agreements
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Commitments and Contingencies Disclosure [Line Items] |  |
Number of operating service agreements, management consulting and technology services | 3 | 3
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 | 4 years | 4 years
Outsourcing agreements, aggregate remaining cost | ¥ 43.4 | $ 274
Management consulting and technology services company application maintenance and development services |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, remaining term | 4 years | 4 years
Outsourcing agreements, aggregate remaining cost | ¥ 14.7 | $ 93
Management consulting and technology services company policy administrative services |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, remaining term | 4 years | 4 years
Outsourcing agreements, aggregate remaining cost | ¥ 6.8 | $ 43
Management consulting and technology services company comprehensive project-related support services |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, remaining term | 2 years | 2 years
Outsourcing agreements, aggregate remaining cost | ¥ 2.3 | $ 15
Information technology and data services company application maintenance and development services first agreement |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, aggregate remaining cost | 1.1 | 7
Information technology and data services company application maintenance and development services second agreement |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, aggregate remaining cost | ¥ 1.8 | $ 11
Information technology and data services company enterprise software licensing |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, remaining term | 2 years | 2 years
Outsourcing agreements, aggregate remaining cost | ¥ 1.5 | $ 10
Information technology and software 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 | ¥ 0.9 | $ 6
Information technology and data services company cloud hosting services |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, remaining term | 3 years | 3 years
Outsourcing agreements, aggregate remaining cost | $ |  | $ 54
Cloud-based software licensing |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Outsourcing agreements, remaining term | 5 years | 5 years
Outsourcing agreements, aggregate remaining cost | ¥ 8.0 | $ 51

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