INSURANCE CONTRACTS ASSETS AND LIABILITIES FROM INSURANCE ACTIVITIES - Short duration contracts, Average Annual Percentage Payout (Details)	Mar. 31, 2025
Life Insurance
Short-Duration Insurance Contracts, Historical Claims Duration [Line Items]
1	16.90%
2	8.50%
3	8.00%
4	66.60%
5	0.00%
6	0.00%
7	0.00%
8	0.00%
Accident Insurance
Short-Duration Insurance Contracts, Historical Claims Duration [Line Items]
1	31.00%
2	52.50%
3	16.50%
4	0.00%
5	0.00%
6	0.00%
7	0.00%
8	0.00%
Civil Liability
Short-Duration Insurance Contracts, Historical Claims Duration [Line Items]
1	38.20%
2	29.60%
3	5.60%
4	21.30%
5	3.40%
6	1.90%
7	0.00%
8	0.00%
Vehicle Owners
Short-Duration Insurance Contracts, Historical Claims Duration [Line Items]
1	63.00%
2	29.20%
3	2.10%
4	1.60%
5	0.70%
6	0.80%
7	0.60%
8	1.90%
Compulsory employer liability insurance
Short-Duration Insurance Contracts, Historical Claims Duration [Line Items]
1	34.60%
2	13.00%
3	6.00%
4	5.10%
5	2.00%
6	3.90%
7	14.00%
8	16.60%
Motor Vehicle
Short-Duration Insurance Contracts, Historical Claims Duration [Line Items]
1	62.20%
2	25.30%
3	5.00%
4	4.20%
5	0.40%
6	0.30%
7	0.60%
8	1.90%
Property Damage
Short-Duration Insurance Contracts, Historical Claims Duration [Line Items]
1	19.60%
2	9.70%
3	32.60%
4	28.30%
5	7.00%
6	0.30%
7	0.60%
8	1.90%

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- Definition

Percentage of average annual payout, after reinsurance, in the eighth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 9F
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480046/944-40-55-9F

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 4G
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-4G

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Percentage of average annual payout, after reinsurance, in the fifth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

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Percentage of average annual payout, after reinsurance, in the fourth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

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Percentage of average annual payout, after reinsurance, in the first year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

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Percentage of average annual payout, after reinsurance, in the seventh year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

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Percentage of average annual payout, after reinsurance, in the sixth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

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Percentage of average annual payout, after reinsurance, in the third year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

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Percentage of average annual payout, after reinsurance, in the second year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts.

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