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PARTNERS' CAPITAL - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	29 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	May 31, 2018
Partners' capital
Repurchase and retire authorization			$ 100
Treasury units retired	$ 0
Number of units retired		5,460,639
Repurchase price (in dollars per unit)		$ 17.12
Simplification Transactions
Partners' capital
Number of units retired		35

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Amount of stock repurchase plan authorized.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the cost method.

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