EQUITY - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended	44 Months Ended
	Aug. 31, 2014	Mar. 31, 2018	Mar. 31, 2018	Mar. 31, 2018	Aug. 03, 2016
Equity [Abstract]
Write-off of accumulated foreign currency translation loss adjustments		$ 11,700,000
Authorized repurchase amount	$ 500,000,000.0				$ 1,000,000,000
Increase in authorized share repurchase authorization					$ 500,000,000.0
Share repurchase period	5 years
Common shares repurchased (shares)		1,700,000.0	2,700,000.0	7,500,000
Common shares repurchased		$ 160,200,000	$ 256,800,000	$ 648,300,000