GOODWILL AND OTHER INTANGIBLE ASSETS - Estimation of Fair Value (Details) - Valuation, Income Approach - Radio Broadcasting	Mar. 31, 2025
Discount rate | Minimum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.095
Discount rate | Maximum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.100
Revenue growth rate range | Minimum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	(0.019)
Revenue growth rate range | Maximum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.010
Terminal growth rate
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	(0.005)
Mature market share range | Minimum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.008
Mature market share range | Maximum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.300
Operating profit margin range | Minimum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.028
Operating profit margin range | Maximum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.300