| Document and Entity Information | Jan. 30, 2023 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | Decarbonization Plus Acquisition Corp IV |
| Amendment Flag | false |
| Entity Central Index Key | 0001848959 |
| Document Type | 8-K |
| Document Period End Date | Jan. 30, 2023 |
| Entity Incorporation State Country Code | E9 |
| Entity File Number | 001-40731 |
| Entity Tax Identification Number | 98-1585724 |
| Entity Address, Address Line One | 2744 Sand Hill Road |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Menlo Park |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94025 |
| City Area Code | (212) |
| Local Phone Number | 993-0076 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Units Each Consisting Of One Class A Ordinary Share And One Half Of One Warrant 2 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one Class A ordinary share and one-half of one warrant |
| Trading Symbol | DCRDU |
| Security Exchange Name | NASDAQ |
| Class A Ordinary Share Par Value 0.0001 Per Share 1 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A ordinary share, par value $0.0001 per share |
| Trading Symbol | DCRD |
| Security Exchange Name | NASDAQ |
| Warrants Each Whole Warrant Exercisable For One Class A Ordinary Share At An Exercise Price Of 11.50 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share |
| Trading Symbol | DCRDW |
| Security Exchange Name | NASDAQ |
