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PARTNERSHIP CAPITAL (Tables)

12 Months Ended

Dec. 31, 2017

Equity [abstract]

Disclosure of classes of share capital

Preferred Unitholders’ Capital



		Preferred Units
UNITS MILLIONS		2017			2016			2015
Opening balance		20.0			10.0			—
Issued for cash		12.0			10.0			10.0
Ending balance		32.0			20.0			10.0



		Preferred Units
US$ MILLIONS		2017				2016				2015
Opening balance		$	375			$	189			$	—
Unit issuance		220				186				189
Ending balance		$	595			$	375			$	189

Special and Limited Partnership Capital



		Special General Partner Units									Limited Partnership Units									Total
UNITS MILLIONS		2017			2016			2015			2017			2016			2015			2017			2016			2015
Opening balance		1.6			1.6			1.6			259.4			243.2			225.5			261.0			244.8			227.1
Issued for cash		—			—			—			17.2			16.4			20.2			17.2			16.4			20.2
Repurchased and cancelled		—			—			—			—			(0.2	)		(2.5	)		—			(0.2	)		(2.5	)
Ending balance		1.6			1.6			1.6			276.6			259.4			243.2			278.2			261.0			244.8



		Special General Partner												Limited Partners												Total
US$ MILLIONS		2017				2016				2015				2017				2016				2015				2017				2016				2015
Opening balance		$	19			$	19			$	19			$	4,215			$	3,716			$	3,201			$	4,234			$	3,735			$	3,220
Unit issuance		—				—				—				692				505				582				692				505				582
Repurchased and cancelled		—				—				—				—				(6		)		(67		)		—				(6		)		(67		)
Ending balance		$	19			$	19			$	19			$	4,907			$	4,215			$	3,716			$	4,926			$	4,234			$	3,735

Non-controlling interest—Redeemable Partnership Units held by Brookfield



		Non-controlling interest— Redeemable Partnership Units held by Brookfield
UNITS MILLIONS		2017			2016			2015
Opening balance		108.4			100.3			88.1
Issued for cash		7.4			8.1			12.2
Ending balance		115.8			108.4			100.3



		Non-controlling interest— Redeemable Partnership Units held by Brookfield
US$ MILLIONS		2017				2016				2015
Opening balance		$	1,778			$	1,528			$	1,178
Unit issuance		300				250				350
Ending balance		$	2,078			$	1,778			$	1,528