Property, Plant and Equipment and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Property Plant And Equipment And Intangible Assets [Abstract]

Property Plant and Equipment and Intangible Assets

	September 30, 2018			December 31, 2017			Estimated Useful Lives (In Years)
Gathering systems	$	7,395.2		$	7,037.2		5 to 20
Processing and fractionation facilities		3,849.0			3,569.6		5 to 25
Terminaling and storage facilities		1,068.1			1,244.1		5 to 25
Transportation assets		456.1			343.6		10 to 25
Other property, plant and equipment		313.8			303.7		3 to 25
Land		146.9			125.7		—
Construction in progress		2,992.4			1,581.5		—
Property, plant and equipment		16,221.5			14,205.4
Accumulated depreciation		(4,140.6	)		(3,775.4	)
Property, plant and equipment, net	$	12,080.9		$	10,430.0
Intangible assets	$	2,736.6		$	2,736.6		10 to 20
Accumulated amortization		(707.0	)		(570.8	)
Intangible assets, net	$	2,029.6		$	2,165.8

Schedule of Changes in Intangible Assets

The changes in our intangible assets are as follows:

Balance at December 31, 2017	$	2,165.8
Amortization		(136.2	)
Balance at September 30, 2018	$	2,029.6