NET INCOME PER COMMON UNIT (Tables)

9 Months Ended

Sep. 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 September 30,		Nine months ended September 30,
(millions of dollars, except per common unit amounts)	2020	2019	2020	2019
Net income attributable to controlling interests	65	56	210	204
Net income attributable to the Class B units	—	(1)	—	(1)
Net income attributable to the General Partner and common units	65	55	210	203
Net income attributable to the General Partner	(1)	(1)	(4)	(4)
Net income attributable to common units	64	54	206	199
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	$0.90	$0.76	$2.89	$2.79