Amount, after sales adjustments, returns, allowances, and discounts, of revenue classified as other.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a),(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_OtherSalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Segment Information - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
Segment Information - Narrative (Details) $ in Millions	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Segment	Sep. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments \| Segment			2
Marketing, Gathering And Compression [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Intersegment Revenues \| $	$ 1,030	$ 1,025	$ 3,200	$ 2,656