| Cover | Nov. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 30, 2021 |
| Entity File Number | 001-39932 |
| Entity Registrant Name | Bridgetown 2 Holdings Limited |
| Entity Central Index Key | 0001831236 |
| Entity Tax Identification Number | 00-0000000 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | c/o 38/F Champion Tower |
| Entity Address, Address Line Two | 3 Garden Road |
| Entity Address, City or Town | Central |
| Entity Address, Country | HK |
| Entity Address, Postal Zip Code | 00000 |
| City Area Code | +852 |
| Local Phone Number | 2514 8888 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Ordinary Shares, par value $0.0001 per share |
| Trading Symbol | BTNB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
