| Document and Entity Information | Dec. 15, 2022 |
| Entity Listings [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 15, 2022 |
| Entity Registrant Name | Lazard Growth Acquisition Corp. I |
| Entity Incorporation, State or Country Code | E9 |
| Entity File Number | 001-40035 |
| Entity Tax Identification Number | 98-1571783 |
| Entity Address, Address Line One | 30 Rockefeller Plaza |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10112 |
| City Area Code | 212 |
| Local Phone Number | 632-6000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001836337 |
| Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-fifth of one redeemable warrant [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-fifth of one redeemable warrant |
| Trading Symbol | LGACU |
| Security Exchange Name | NASDAQ |
| Class A ordinary shares, $0.0001 par value [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares, $0.0001 par value |
| Trading Symbol | LGAC |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 |
| Trading Symbol | LGACW |
| Security Exchange Name | NASDAQ |
