Property, Plant and Equipment and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Property Plant And Equipment And Intangible Assets [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

	December 31, 2016			December 31, 2015			Estimated Useful Lives (In Years)
Gathering systems	$	6,626.8		$	6,304.5		5 to 20
Processing and fractionation facilities		3,390.2			2,995.2		5 to 25
Terminaling and storage facilities		1,205.0			1,115.0		5 to 25
Transportation assets		451.4			454.0		10 to 25
Other property, plant and equipment		274.2			221.1		3 to 25
Land		121.3			108.8		—
Construction in progress		449.8			736.5		—
Property, plant and equipment		12,518.7			11,935.1
Accumulated depreciation		(2,827.7	)		(2,232.4	)
Property, plant and equipment, net	$	9,691.0		$	9,702.7
Intangible assets	$	2,036.6		$	2,036.6		20
Accumulated amortization		(382.6	)		(226.5	)
Intangible assets, net	$	1,654.0		$	1,810.1

Schedule of Changes in Intangible Assets

The changes in our intangible assets are as follows:

	December 31, 2016			December 31, 2015
Beginning of period	$	1,810.1		$	591.9
Additions from acquisition		—			1,354.9
Amortization		(156.1	)		(136.7	)
Intangible assets, net	$	1,654.0		$	1,810.1