Distributions - Schedule of Common Stock on Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Equity [Abstract]
Distributions declared and payable (in dollars per share)	$ 0.36	$ 0.36	$ 0.41	$ 0.36	$ 0.41	$ 0.34	$ 0.72	$ 0.75	$ 1.52
Distributions amount	$ 18,934	$ 19,149	$ 21,835	$ 19,234	$ 21,960	$ 18,279	$ 38,083	$ 40,239	$ 81,308
Percentage							100.00%	100.00%	100.00%

Investment Company, Investment Income (Loss), Cash Distribution Percentage

No definition available.

Name:	cion_InvestmentCompanyInvestmentIncomeLossCashDistributionPercentage
Namespace Prefix:	cion_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

+ Details

Name:	us-gaap_DividendsCommonStockCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration