Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Inventory, Current

Our inventory, which is stated at the lower of cost or net realizable value and cost is computed predominantly using the average cost method, consisted of the following (in millions):

	December 31,
	2021		2020
NGLs, crude oil and natural gas	$	155.6	$	88.0
Spare parts	0.9		1.1
Total inventory	$	156.5	$	89.1

Estimated Useful Lives Of Property, Plant And Equipment

Depreciation is computed using the straight-line method over the estimated useful lives of the assets, as follows:

	Years
Gathering systems and pipelines	15 - 20
Facilities and equipment	3 - 25
Buildings, rights-of-way and easements	1 - 40
Office furniture and fixtures	5- 10
Vehicles	5

Intangible Assets, Useful life

Certain intangible assets are amortized on a straight-line basis over their estimated economic lives, as follows:

	Weighted-Average Life (years)
Customer accounts	22
Revenue contracts	18
Trademarks	10

Our intangible assets consisted of the following (in millions):

	December 31,
	2021		2020
Customer accounts(1)	$	488.7	$	488.7
Revenue contracts	631.2		631.2
Trademarks	6.2		6.2
	1,126.1		1,126.1
Less: accumulated amortization	393.2		331.8
Total intangible assets, net	$	732.9	$	794.3

(1)This amount includes $49.8 million related to customer accounts acquired in conjunction with the NGL Asset Acquisition which is further discussed in Note 3.

The following table summarizes total accumulated amortization of our intangible assets (in millions):

	December 31,
	2021		2020
Customer accounts	$	183.2	$	158.5
Revenue contracts	204.6		168.6
Trademarks	5.4		4.7
Total accumulated amortization	$	393.2	$	331.8

Schedule of Goodwill

The following table summarizes the goodwill of our reporting units (in millions). We did not record any impairments of the goodwill associated with our Arrow or NGL Marketing and Logistics reporting units during the years ended December 31, 2021, 2020 and 2019. At December 31, 2021, our accumulated goodwill impairments at CEQP and CMLP were approximately $1,736.8 million and $1,479.6 million, respectively.

	Goodwill at January 1, 2020		Impairment during the Year Ended December 31, 2020		Goodwill at December 31, 2020		Goodwill at December 31, 2021
Gathering and Processing North
Arrow	$	45.9	$	—	$	45.9	$	45.9
Powder River Basin	80.3		(80.3)		—		—
Storage and Logistics
NGL Marketing and Logistics	92.7		—		92.7		92.7
Total	$	218.9	$	(80.3)	$	138.6	$	138.6