CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Millions	Total	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Limited Partner Common Units	General Partner
Beginning balance at Dec. 31, 2013	$ 4,063.4	$ (63.8)	$ 86.5	$ 3,963.4	$ 77.3
Add (deduct):
Net income (loss)	109.9		(86.9)	192.9	3.9
Distributions paid	(74.4)			(72.9)	(1.5)
Capital contributions from noncontrolling interests	8.2		8.2
Distributions paid to noncontrolling interests	(7.5)		(7.5)
Other comprehensive loss	(4.5)	(4.5)
Ending balance at Sep. 30, 2014	4,095.1	(68.3)	0.3	4,083.4	79.7
Add (deduct):
Net income (loss)	28.4
Ending balance at Sep. 30, 2014	4,095.1	(68.3)	0.3	4,083.4	79.7
Beginning balance at Dec. 31, 2014	4,102.3	(72.8)	0.0	4,095.1	80.0
Add (deduct):
Net income (loss)	156.4			153.3	3.1
Distributions paid	(76.0)			(74.5)	(1.5)
Sale of common units net of related transaction costs	113.1			113.1
Capital contribution from general partner	2.3				2.3
Other comprehensive loss	(2.5)	(2.5)
Ending balance at Sep. 30, 2015	4,295.6	(75.3)	0.0	4,287.0	83.9
Add (deduct):
Net income (loss)	38.3
Ending balance at Sep. 30, 2015	$ 4,295.6	$ (75.3)	$ 0.0	$ 4,287.0	$ 83.9