Rosetta Merger Narrative (Details) - Jul. 20, 2015 - Subsequent Event [Member] - Rosetta Resources, Inc [Member] a in Thousands, shares in Millions	a business $ / shares shares
Business Acquisition [Line Items]
Number of onshore plays added in acquisition \| business	2
Share price \| $ / shares	$ 36.97
Eagle Ford Shale [Member]
Business Acquisition [Line Items]
Liquid rich asset based acquired	50
Permian [Member]
Business Acquisition [Line Items]
Liquid rich asset based acquired	54
Delaware Basin [Member]
Business Acquisition [Line Items]
Liquid rich asset based acquired	45
Midland Basin [Member]
Business Acquisition [Line Items]
Liquid rich asset based acquired	9
Common Stock
Business Acquisition [Line Items]
Shares exchange in acquisition \| shares	41
Exchange ratio of common shares for acquired company	0.542

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)(4)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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