Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]


	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total (1)

	(in millions, except per unit data)
2020
Total revenues	$	8,269	$	3,225	$	5,833	$	5,963	$	23,290
Gross margin (2)	$	(189)	$	282	$	314	$	5	$	411
Operating income/(loss)	$	(2,773)	$	210	$	253	$	(65)	$	(2,375)
Net income/(loss)	$	(2,845)	$	144	$	146	$	(25)	$	(2,580)
Net income/(loss) attributable to PAA	$	(2,847)	$	142	$	143	$	(28)	$	(2,590)
Basic net income/(loss) per common unit	$	(3.98)	$	0.13	$	0.13	$	(0.11)	$	(3.83)
Diluted net income/(loss) per common unit	$	(3.98)	$	0.13	$	0.13	$	(0.11)	$	(3.83)
Cash distributions per common unit (3)	$	0.36	$	0.18	$	0.18	$	0.18	$	0.90

2019
Total revenues	$	8,375	$	8,253	$	7,886	$	9,154	$	33,669
Gross margin (2)	$	790	$	526	$	566	$	403	$	2,285
Operating income	$	714	$	451	$	492	$	331	$	1,988
Net income	$	970	$	448	$	454	$	307	$	2,180
Net income attributable to PAA	$	970	$	446	$	449	$	306	$	2,171
Basic net income per common unit	$	1.26	$	0.54	$	0.55	$	0.35	$	2.70
Diluted net income per common unit	$	1.20	$	0.54	$	0.55	$	0.35	$	2.65
Cash distributions per common unit (3)	$	0.30	$	0.36	$	0.36	$	0.36	$	1.38

(1)The sum of the four quarters may not equal the total year due to rounding.

(2)Gross margin is calculated as Total revenues less (i) Purchases and related costs, (ii) Field operating costs, (iii) Depreciation and amortization and (iv) (Gains)/losses on asset sales and asset impairments, net.

(3)Represents cash distributions declared and paid in the period presented.