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v3.22.1

Insurance Contracts and Private Pension - Summary of Main Insurance lines (Detail) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Group Accident Insurance [Member] |  |  |
Disclosure of Types of Insurance Contracts [Line Items] |  |  |
Sales ratio | 31.50% | 33.80% | 35.10%
Loss ratio | 14.50% | 11.30% | 6.80%
Individual Accident Insurance |  |  |
Disclosure of Types of Insurance Contracts [Line Items] |  |  |
Sales ratio | 18.70% | 18.80% | 18.80%
Loss ratio | 26.70% | 29.40% | 24.10%
Credit Life Insurance |  |  |
Disclosure of Types of Insurance Contracts [Line Items] |  |  |
Sales ratio | 22.90% | 24.20% | 23.70%
Loss ratio | 26.10% | 22.30% | 18.00%
Random Events [Member] |  |  |
Disclosure of Types of Insurance Contracts [Line Items] |  |  |
Sales ratio | 23.30% | 23.50% | 23.50%
Loss ratio | 32.00% | 34.30% | 26.30%
Multiple Peril [Member] |  |  |
Disclosure of Types of Insurance Contracts [Line Items] |  |  |
Sales ratio | 43.10% | 44.40% | 46.40%
Loss ratio | 24.00% | 52.90% | 60.20%
Mortagage Insurance in Market Policies Credit Life Insurance [Member] |  |  |
Disclosure of Types of Insurance Contracts [Line Items] |  |  |
Sales ratio | 20.30% | 20.40% | 20.00%
Loss ratio | 26.50% | 18.50% | 17.30%
Group Life |  |  |
Disclosure of Types of Insurance Contracts [Line Items] |  |  |
Sales ratio | 23.80% | 24.00% | 23.20%
Loss ratio | 53.50% | 41.00% | 34.40%

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