Related Party Transactions - Segregated Portfolio Company Purchase (Details) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 11, 2026 |
Sep. 30, 2026 |
Aug. 31, 2026 |
Jul. 31, 2026 |
Jun. 30, 2026 |
May 31, 2026 |
Apr. 30, 2026 |
Mar. 31, 2026 |
Feb. 28, 2026 |
Jan. 31, 2026 |
Sep. 30, 2025 |
Aug. 31, 2025 |
Jul. 31, 2025 |
Jun. 30, 2025 |
May 31, 2025 |
Apr. 30, 2025 |
Mar. 31, 2025 |
Feb. 28, 2025 |
Jan. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Related Party Transaction [Line Items] | |||||||||||||||||||||||
| Stock issued during the period shares new issues | 5,035,671 | 1,134,111 | 8,865,731 | 10,650,045 | 5,680,855 | 10,381,667 | 3,361,013 | 438,709 | 5,164,340 | 3,624,185 | 3,886,374 | 2,115,437 | 3,052,634 | 849,290 | 3,273,944 | 2,030,616 | 2,949,039 | 1,191,393 | 50,712,142 | 22,972,912 | |||
| Proceeds from issuance of shares, net of changes in subscriptions received in advance | $ 1,269,297 | $ 563,028 | |||||||||||||||||||||
| Shares issued in connection with DRIP | 551,335 | 675,220 | 608,290 | 675,220 | 589,003 | 1,952,334 | 1,525,234 | ||||||||||||||||
| Stepstone Private Credit Fund SP [Member] | |||||||||||||||||||||||
| Related Party Transaction [Line Items] | |||||||||||||||||||||||
| Stock issued during the period shares new issues | 8,183,241 | 8,925,168 | 30,466,905 | 21,318,794 | |||||||||||||||||||
| Proceeds from issuance of shares, net of changes in subscriptions received in advance | $ 213,442 | $ 234,391 | $ 797,612 | $ 559,628 | |||||||||||||||||||
| Shares issued in connection with DRIP | 663,473 | 589,003 | 1,931,432 | 1,519,725 | |||||||||||||||||||
| Stock issued during period, value, dividend reinvestment plan | $ 17,140 | $ 15,302 | $ 50,084 | $ 39,505 | |||||||||||||||||||
| StepStone Private Credit Enhanced Fund SP [Member] | |||||||||||||||||||||||
| Related Party Transaction [Line Items] | |||||||||||||||||||||||
| Stock issued during the period shares new issues | 6,080,290 | 17,753,122 | |||||||||||||||||||||
| Proceeds from issuance of shares, net of changes in subscriptions received in advance | $ 157,127 | $ 459,737 | |||||||||||||||||||||