Revenue - Schedule of Subscription and Transaction Fees Disaggregated by Customer Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Disaggregation Of Revenue [Line Items]
Total revenue	$ 395,741	$ 358,450
Subscription and transaction fees
Disaggregation Of Revenue [Line Items]
Total revenue	358,005	314,943
Integrated platform
Disaggregation Of Revenue [Line Items]
Total revenue	335,882	294,860
BILL AP/AR
Disaggregation Of Revenue [Line Items]
Total revenue	178,596	162,256
BILL Spend and Expense
Disaggregation Of Revenue [Line Items]
Total revenue	157,286	132,604
Embedded and Other Solutions
Disaggregation Of Revenue [Line Items]
Total revenue	22,123	20,083
Interest on funds held for customers
Disaggregation Of Revenue [Line Items]
Total revenue	$ 37,736	$ 43,507