NET INCOME PER COMMON UNIT (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Schedule of net income per common unit

Net income per common unit was determined as follows:

(unaudited)	Three months ended June 30,		Six months ended June 30,
(millions of dollars, except per common unit amounts)	2020	2019	2020	2019
Net income attributable to controlling interests	57	55	145	148
Net income attributable to the General Partner	(1)	(1)	(3)	(3)
Net income attributable to common units	56	54	142	145
Weighted average common units outstanding (millions) — basic and diluted	71.3	71.3	71.3	71.3
Net income per common unit — basic and diluted	$0.78	$0.75	$1.99	$2.03