JOINT VENTURES - BSP (Details) - BSP JV - Joint venture with BSP $ in Millions	16 Months Ended
Jun. 30, 2018 item	Dec. 31, 2019 USD ($)	Feb. 28, 2017 USD ($)
JOINT VENTURES
Maximum commitment contribution			$ 250
Commitment contributed		$ 200
Number of equal funding contributions \| item	4

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