Earnings Per Unit (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Unit

The following table summarizes the basic and diluted earnings per unit calculations (in millions, except per unit amounts):

	2018		2017		2016
Allocation of net income among partner interests:
Net income allocated to Class A common unitholders	$	612	$	626	$	346
Net income allocated to Partnership exchangeable unitholders	531		585		337
Net income attributable to common unitholders	$	1,143	$	1,211	$	683
Denominator - basic and diluted partnership units:
Weighted average Class A common units	202		202		202
Weighted average Partnership exchangeable units	216		226		228
Earnings per unit - basic and diluted:
Class A common units (a)	$	3.03	$	3.10	$	1.71
Partnership exchangeable units (a)	$	2.46	$	2.59	$	1.48

(a) Earnings per unit may not recalculate exactly as it is calculated based on unrounded numbers.