Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands	Oct. 20, 2023	Oct. 13, 2023	Mar. 12, 2019
Subsequent Event [Line Items]
Stock issued during period shares new issues			2,800,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock issued during period shares new issues		1,500,000
Aggregate offering price		$ 16,300
SPV Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Line of credit facility, expiration date	Aug. 15, 2024
Minimum [Member] \| SPV Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Line of credit facility, increase (decrease), net	$ 261,388
Minimum [Member] \| Canadian Dollar Offered Rate [Member] \| SPV Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument, basis spread on variable rate	2.70%
Minimum [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| SPV Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument, basis spread on variable rate	2.70%
Maximum [Member] \| SPV Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Line of credit facility, increase (decrease), net	$ 300,000
Maximum [Member] \| Canadian Dollar Offered Rate [Member] \| SPV Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument, basis spread on variable rate	2.90%
Maximum [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| SPV Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument, basis spread on variable rate	2.90%

SCP Private Credit Income BDC LLC 10-Q