| Cover | Nov. 07, 2024 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 07, 2024 |
| Entity File Number | 001-41757 |
| Entity Registrant Name | HAYMAKER ACQUISITION CORP. 4 |
| Entity Central Index Key | 0001970509 |
| Entity Tax Identification Number | 86-2213850 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 501 Madison Avenue |
| Entity Address, Address Line Two | Floor 5 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10022 |
| City Area Code | 212 |
| Local Phone Number | 616-9600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Unitseachconsistingofone Class Aordinaryshare [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant |
| Trading Symbol | HYAC U |
| Security Exchange Name | NYSE |
| Class Aordinarysharesparvalue [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares, par value $0.0001 per share |
| Trading Symbol | HYAC |
| Security Exchange Name | NYSE |
| Warrantseachwholewarrantexercisableforone Class Aordinaryshare [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share |
| Trading Symbol | HYAC WS |
| Security Exchange Name | NYSE |
