The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

No definition available.

+ Details

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Subsequent Event (details) (Western Gas Partners [Member], USD $)	9 Months Ended	0 Months Ended
	Sep. 30, 2014	Oct. 28, 2014 Subsequent Event [Member] Nuevo Midstream, LLC [Member]	Oct. 28, 2014 Subsequent Event [Member] Nuevo Midstream, LLC [Member] Minimum [Member]	Oct. 28, 2014 Subsequent Event [Member] Nuevo Midstream, LLC [Member] Maximum [Member]	Oct. 28, 2014 Subsequent Event [Member] Nuevo Midstream, LLC [Member] Redeemable Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Cash consideration		$ 1,500,000,000
Class C unit proceeds					$ 750,000,000
Percentage acquired	100.00%		50.00%	100.00%