| Document and Entity Information | Jun. 03, 2022 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jun. 3, 2022 |
| Entity Registrant Name | Oaktree Acquisition Corp. II |
| Entity Incorporation, State or Country Code | E9 |
| Entity File Number | 001-39526 |
| Entity Tax Identification Number | 98-1551592 |
| Entity Address, Address Line One | 333 South Grand Avenue |
| Entity Address, Address Line Two | 28th Floor |
| Entity Address, City or Town | Los Angeles |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90071 |
| City Area Code | 213 |
| Local Phone Number | 830-6300 |
| 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 |
| Amendment Flag | false |
| Entity Central Index Key | 0001820931 |
| Capital Units [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-fourth of one redeemable warrant |
| Trading Symbol | OACB.U |
| Security Exchange Name | NYSE |
| Common Class A [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares included as part of the units |
| Trading Symbol | OACB |
| Security Exchange Name | NYSE |
| Warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 |
| Trading Symbol | OACB WS |
| Security Exchange Name | NYSE |
