| Document and Entity Information | Jun. 01, 2021 |
| Cover [Abstract] | |
| Amendment Flag | true |
| Entity Central Index Key | 0001786352 |
| Document Type | 8-K/A |
| Document Period End Date | Jun. 1, 2021 |
| Entity Registrant Name | Bill.com Holdings, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39149 |
| Entity Tax Identification Number | 83-2661725 |
| Entity Address, Address Line One | 1800 Embarcadero Road |
| Entity Address, City or Town | Palo Alto |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94303 |
| City Area Code | (650) |
| Local Phone Number | 621-7700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.00001 |
| Trading Symbol | BILL |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Description | On June 1, 2021, Bill.com Holdings, Inc. (the “Company”) filed a Current Report on Form 8-K (the “Filing”), to report that it had completed its acquisition of DivvyPay, Inc. (“DivvyPay”) pursuant to the Agreement and Plan of Merger, dated as of May 6, 2021 (the “Merger Agreement”), by and between the Company and DivvyPay. Pursuant to the Merger Agreement, DivvyPay merged with and into the Company (the “Merger”), with the Company continuing as the surviving corporation in the Merger. This Current Report on Form 8-K/A amends the Filing to include the financial statements of DivvyPay and the pro forma financial information required by Item 9.01 Form 8-K. The pro forma financial information included in this Current Report on Form 8-K/A has been presented for informational purposes only, as required by Form 8-K. It does not purport to represent the actual results of operations that the Company and DivvyPay would have achieved had the companies been combined during the periods presented in the pro forma financial information and is not intended to project the future results of operations that the combined company may achieve after completion of the Merger. Except as described above, all other information in the Filing remains unchanged. |
