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Financial Assets and Liabilities - Summary of Market Value of Senior Notes that are listed on Luxembourg Stock Exchange (Detail) | Dec. 31, 2021 | Dec. 31, 2020
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Senior notes due 2023 [member] | Cosan S.A. [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage | 100.26% | 101.02%
Senior notes due 2024 [member] | Rumo S A [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage |  | 104.17%
Senior notes due 2024 [member] | Cosan Limited [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage |  | 103.22%
Senior notes due 2025[member] | Rumo S A [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage | 103.04% | 105.96%
Senior notes due 2027 [member] | Cosan S.A. [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage | 103.79% | 108.20%
Senior Notes Due 2028 [Member] | Rumo S A [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage | 103.42% | 108.75%
Senior Notes Due 2029[Member] | Cosan S.A. [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage | 104.39% | 110.05%
Senior Notes Due 2032 [Member] | Rumo S A [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage | 94.34% |
Perpetual notes [member] | Cosan S.A. [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Senior Notes, quoted market price percentage | 102.17% | 102.88%

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