Net Income Per Limited Partner Unit (Tables)

12 Months Ended

Dec. 31, 2017

Partners' Capital Notes [Abstract]

Schedule of Allocation of Net Income to Arrive at Net Income Per Limited Partner Unit

The following tables show the allocation of net income attributable to the Partnership to arrive at net income per limited partner unit:

	2017		2016		2015
Net income	$	391.8	$	377.5	$	374.0
Less:
Net income attributable to the Parent	77.3		102.3		133.8
Net income attributable to noncontrolling interests	19.2		30.3		73.1
Net income attributable to the Partnership	295.3		244.9		167.1
Less:
General partner's distribution declared	64.6		24.2		4.0
Limited partners' distribution declared on common units	227.7		109.8		60.1
Limited partner's distribution declared on subordinated units	—		69.2		53.3
Income in excess of distributions	$	3.0	$	41.7	$	49.7

Schedule of Basic and Diluted Net Income Per Unit

	2017
	General Partner		Limited Partners' Common Units		Total
	(in millions of dollars, except per unit data)
Distributions declared	$	64.6	$	227.7	$	292.3
Income in excess of distributions	—		3.0		3.0
Net income attributable to the Partnership	$	64.6	$	230.7	$	295.3
Weighted average units outstanding (in millions):
Basic and diluted	3.7		180.4		184.1
Net income per limited partner unit (in dollars):
Basic and diluted			$	1.28

	2016
	General Partner		Limited Partners' Common Units		Limited Partner's Subordinated Units		Total
	(in millions of dollars, except per unit data)
Distributions declared	$	24.2	$	109.8	$	69.2	$	203.2
Income in excess of distributions	0.8		24.6		16.3		41.7
Net income attributable to the Partnership	$	25.0	$	134.4	$	85.5	$	244.9
Weighted average units outstanding (in millions):
Basic and diluted	3.5		101.9		67.5		172.9
Net income per limited partner unit (in dollars):
Basic and diluted			$	1.32	$	1.27

	2015
	General Partner		Limited Partners' Common Units		Limited Partner's Subordinated Units		Total
	(in millions of dollars, except per unit data)
Distributions declared	$	4.0	$	60.1	$	53.3	$	117.4
Income in excess of distributions	1.0		25.4		23.3		49.7
Net income attributable to the Partnership	$	5.0	$	85.5	$	76.6	$	167.1
Weighted average units outstanding (in millions):
Basic and diluted	2.9		73.4		67.5		143.8
Net income per limited partner unit (in dollars):
Basic and diluted			$	1.16	$	1.14