| Document and Entity Information | Mar. 25, 2024 |
| Document And Entity Information [Line Items] | |
| Entity Tax Identification Number | 00-0000000 |
| Entity Address, Region | GRAND CAYMAN |
| Amendment Flag | false |
| Entity Central Index Key | 0001868573 |
| Document Type | 8-K |
| Document Period End Date | Mar. 25, 2024 |
| Entity Registrant Name | APX Acquisition Corp. I |
| Entity Incorporation State Country Code | E9 |
| Entity File Number | 001-41125 |
| Entity Address, Address Line One | 714 Westview Avenue |
| Entity Address, City or Town | Nashville |
| Entity Address, Country | TN |
| Entity Address, State or Province | TN |
| Entity Address, Postal Zip Code | 37205 |
| City Area Code | (202) |
| Local Phone Number | 465-5882 |
| 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 |
| Units Each Consisting Of One Class A Ordinary Share Par Value 0.0001 Per Share And One Half Of One Redeemable Warrant 3 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one Class A Ordinary Share, par value $0.0001 per share, and one-half of one Redeemable Warrant |
| Trading Symbol | APXIU |
| Security Exchange Name | NASDAQ |
| Class A Ordinary Shares Par Value 0.0001 Per Share 1 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A Ordinary Shares, par value $0.0001 per share |
| Trading Symbol | APXI |
| Security Exchange Name | NASDAQ |
| Warrant Each Whole Warrant Exercisable For One Class A Ordinary Share For 11.50 Per Share 2 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrant, each whole warrant exercisable for one Class A Ordinary Share for $11.50 per share |
| Trading Symbol | APXIW |
| Security Exchange Name | NASDAQ |
