Note 5- Acquired Intangibles and Goodwill (Notes)	12 Months Ended
Note 5- Acquired Intangibles and Goodwill (Notes)	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
ACQUIRED INTANGIBLES AND GOODWILL	ACQUIRED INTANGIBLES AND GOODWILL ACQUIRED INTANGIBLES The acquired intangible assets, net of accumulated amortization, was $947 million at December 31, 2016 consisting of customer relationships associated with the natural gas processing and gathering operations from the Rockies Natural Gas Business Acquisition. The value for the identified customer relationships consists of cash flows expected from existing contracts and future arrangements from the existing customer base. Accumulated amortization was $61 million and $32 million at December 31, 2016 and 2015, respectively. Amortization expense of acquired intangible assets was $29 million for both years ended December 31, 2016 and 2015. As of December 31, 2016, amortization expense is expected to be approximately $29 million per year through 2021. GOODWILL We had goodwill of $117 million and $130 million at December 31, 2016 and 2015, respectively. The deconsolidation of RGS, as further discussed in Note 6, reduced the Partnership’s consolidated goodwill by approximately $13 million. For 2016, we elected to perform our annual goodwill impairment using a two-step quantitative assessment process on our goodwill of $117 million. As part of our two-step quantitative goodwill impairment process, we engaged a third party appraisal firm to assist in the determination of estimated fair value. This determination includes estimating the fair value using both the income and market approaches. The income approach requires management to estimate a number of factors, including projected future operating results, economic projections, anticipated future cash flows and discount rates. The market approach estimates fair value using comparable marketplace fair value data from within a comparable industry grouping. The determination of the fair value requires us to make significant estimates and assumptions. These estimates and assumptions primarily include, but are not limited to, the selection of appropriate peer group companies, control premiums appropriate for acquisitions in the industries in which we compete, the discount rates, terminal growth rates, and forecasts of revenue, operating income, depreciation and amortization and capital expenditures. We determined that no impairment charges resulted from our November 1, 2016 goodwill impairment assessments. Furthermore, the fair value tested in step one of the goodwill impairment test exceeded the carrying value such that we were not required to perform step two. There were no impairments of goodwill during the years ended December 31, 2016, 2015 and 2014.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.