| N-2 | 6 Months Ended |
| Jun. 30, 2023 shares | |
| Cover [Abstract] | |
| Entity Central Index Key | 0000810766 |
| Amendment Flag | false |
| Document Type | N-CSRS |
| Entity Registrant Name | CREDIT SUISSE ASSET MANAGEMENT INCOME FUND INC |
| General Description of Registrant [Abstract] | |
| Investment Objectives and Practices [Text Block] | The investment objective of the Fund is to provide current income consistent with the preservation of capital. |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Other Security, Description [Text Block] | the Fund had outstanding loans of securities to certain approved brokers for which the Fund received collateral: |
| Common Shares [Member] | |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Outstanding Security, Title [Text Block] | shares outstanding |
| Outstanding Security, Not Held [Shares] | 52,644,857 |
| Beneficial Interest [Member] | |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Outstanding Security, Title [Text Block] | The Fund has one class of shares of common stock, par value $0.001 per share; one hundred million shares are authorized. |
