NET LOSS PER SHARE - Anti dilutive securities (Details) shares in Millions	3 Months Ended
	Dec. 31, 2022 shares
Securities not included in the computation of diluted earnings (loss) per share
Anti dilutive securities	18.6
RSUs
Securities not included in the computation of diluted earnings (loss) per share
Anti dilutive securities	9.9
Performance-based stock units
Securities not included in the computation of diluted earnings (loss) per share
Anti dilutive securities	2.5
Market-conditioned performance awards
Securities not included in the computation of diluted earnings (loss) per share
Anti dilutive securities	2.4
Stock options
Securities not included in the computation of diluted earnings (loss) per share
Anti dilutive securities	3.7