Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]


	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total ⁽¹⁾
	(in millions, except per unit data)
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

2018
Total revenues	$	8,398	$	8,080	$	8,792	$	8,786	$	34,055
Gross margin⁽²⁾	$	460	$	168	$	567	$	1,399	$	2,593
Operating income	$	381	$	88	$	493	$	1,315	$	2,277
Net income	$	288	$	100	$	710	$	1,117	$	2,216
Net income attributable to PAA	$	288	$	100	$	710	$	1,117	$	2,216
Basic net income per common unit	$	0.33	$	0.07	$	0.91	$	1.46	$	2.77
Diluted net income per common unit	$	0.33	$	0.07	$	0.87	$	1.38	$	2.71
Cash distributions per common unit ⁽³⁾	$	0.30	$	0.30	$	0.30	$	0.30	$	1.20

⁽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.