Share Data and Distributions - Schedule of Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Class of Stock [Line Items]
Amount Repurchased (all classes)	$ 278,861	$ 49,910	$ 5,376
December 31, 2024
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)	889,569
Percentage of Outstanding Shares Repurchased	0.66%
Price Paid Per Share (in dollars per share)	$ 23.52
Amount Repurchased (all classes)	$ 20,910
March 31, 2025
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)	941,577
Percentage of Outstanding Shares Repurchased	0.65%
Price Paid Per Share (in dollars per share)	$ 23.28
Amount Repurchased (all classes)	$ 21,923
June 30, 2025
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)	7,563,088
Percentage of Outstanding Shares Repurchased	4.66%
Price Paid Per Share (in dollars per share)	$ 23.14
Amount Repurchased (all classes)	$ 175,010
September 30, 2025
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)	2,642,628
Percentage of Outstanding Shares Repurchased	1.45%
Price Paid Per Share (in dollars per share)	$ 23.09
Amount Repurchased (all classes)	$ 61,018
December 31, 2023
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)		446,089
Percentage of Outstanding Shares Repurchased		0.69%
Price Paid Per Share (in dollars per share)		$ 23.62
Amount Repurchased (all classes)		$ 10,526
March 31, 2024
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)		348,944
Percentage of Outstanding Shares Repurchased		0.41%
Price Paid Per Share (in dollars per share)		$ 23.61
Amount Repurchased (all classes)		$ 8,217
June 30, 2024
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)		702,746
Percentage of Outstanding Shares Repurchased		0.67%
Price Paid Per Share (in dollars per share)		$ 23.53
Amount Repurchased (all classes)		$ 16,544
September 30, 2024
Class of Stock [Line Items]
Total Number of Shares Repurchased (all classes) (in shares)		622,439
Percentage of Outstanding Shares Repurchased		0.51%
Price Paid Per Share (in dollars per share)		$ 23.56
Amount Repurchased (all classes)		$ 14,623

Oaktree Strategic Credit Fund 10-K