| Document and Entity Information | Oct. 07, 2021 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | Switchback II Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0001829730 |
| Document Type | 8-K |
| Document Period End Date | Oct. 7, 2021 |
| Entity Incorporation State Country Code | E9 |
| Entity File Number | 001-39863 |
| Entity Tax Identification Number | 98-1564143 |
| Entity Address, Address Line One | 5949 Sherry Lane |
| Entity Address, Address Line Two | Suite 1010 |
| Entity Address, City or Town | Dallas |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75225 |
| City Area Code | (972) |
| Local Phone Number | 514-9535 |
| 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 Share Of Class A Common Stock And One Fifth Of One Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one share of Class A common stock and one-fifth of one warrant |
| Trading Symbol | SWBK.U |
| Security Exchange Name | NYSE |
| Class A Common Stock Par Value 0.0001 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A common stock, par value $0.0001 per share |
| Trading Symbol | SWBK |
| Security Exchange Name | NYSE |
| Warrants Each Whole Warrant Exercisable For One Share Of Class A Common Stock 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 share of Class A common stock at an exercise price of $11.50 per share |
| Trading Symbol | SWBK.WS |
| Security Exchange Name | NYSE |
