ORGANIZATION (Details)	1 Months Ended	12 Months Ended
	Sep. 30, 2018 seat	Sep. 30, 2019 a
Entity Information [Line Items]
Number of seats | seat	5,000
Business acquisition property operations term		21 years
Salishan-Mohegan and Cowlitz Project
Entity Information [Line Items]
Ownership percentage		100.00%
Inspire Integrated Resort and MGA Korea
Entity Information [Line Items]
Ownership percentage		100.00%
Mohegan Sun
Entity Information [Line Items]
Size of gaming and entertainment complex (in acres)		196
Mohegan Sun Pocono
Entity Information [Line Items]
Size of gaming and entertainment complex (in acres)		400