Business combinations and capital reorganization (Details 2) - BRL (R$)		8 Months Ended	12 Months Ended
		Aug. 31, 2022	Dec. 31, 2022
Customer list
Disclosure of detailed information about business combination [line items]
Useful life measured as period of time, intangible assets other than goodwill			10 years
Zetta Health Analytics SA
Disclosure of detailed information about business combination [line items]
Intangible assets	[1]	R$ 6,332,000
Zetta Health Analytics SA | Customer list
Disclosure of detailed information about business combination [line items]
Intangible assets		R$ 2,212
Valuation techniques used for measuring fair value of separately identified intangible		Multi-period excess earning method
Useful life measured as period of time, intangible assets other than goodwill		6 years 4 months 24 days
Zetta Health Analytics SA | Technology
Disclosure of detailed information about business combination [line items]
Intangible assets		R$ 4,120
Valuation techniques used for measuring fair value of separately identified intangible		Relief from royalty
Useful life measured as period of time, intangible assets other than goodwill		5 years

[1] For the purchase price allocation, the following intangible assets were identified. The valuation techniques used for measuring the fair value of separately identified intangible assets acquired were as follows:      AssetsAmountMethodExpected amortization periodCustomer list2,212Multi-period excess earning method6.4 yearsTechnology4,120Relief from royalty5 years