Costs Incurred, Lease Acquisitions and Other

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Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Reference Price

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Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates (Energy), Other Factors

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Results of Operations, Depreciation, Depletion, Amortization and Accretion, Per Unit

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Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties.

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Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have proved reserves.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 18

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e62014-109447

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e62038-109447

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Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have unproved reserves.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e62038-109447

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-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 18

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e62014-109447

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Amount of asset retirement obligations (ARO) costs incurred (whether capitalized or charged to expense) during the period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)(1)

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Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Supplemental Information Relating to Oil and Natural Gas Producing Activities (Unaudited) - Costs Incurred in Oil and Gas Property Acquisiton, Exploration, and Development (Details) $ in Millions	8 Months Ended				12 Months Ended
	Sep. 30, 2013 USD ($) $ / MMBTU $ / bbl	Sep. 30, 2013 Mcfe $ / MMBTU $ / bbl	Sep. 30, 2013 $ / MMBTU $ / bbl $ / Mcfe	Sep. 30, 2013 $ / MMBTU $ / bbl $ / Boe	Sep. 30, 2015 USD ($) $ / MMBTU $ / bbl	Sep. 30, 2015 $ / MMBTU $ / bbl $ / Mcfe	Sep. 30, 2015 $ / MMBTU $ / bbl $ / Boe	Sep. 30, 2014 USD ($) $ / MMBTU $ / bbl	Sep. 30, 2014 Mcfe $ / MMBTU $ / bbl	Sep. 30, 2014 $ / MMBTU $ / bbl $ / Mcfe	Sep. 30, 2014 $ / MMBTU $ / bbl $ / Boe
Compass
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Proved property acquisition costs	$ 569.5				$ 95.9			$ 0.0
Unproved property acquisition costs	53.9				0.0			0.0
Total property acquisition costs	623.4				95.9			0.0
Development	11.8				17.3			11.4
Lease acquisitions and other	0.0				1.0			0.2
Capitalized asset retirement costs	$ 0.1				$ (0.4)			$ 0.1
Depreciation, depletion and amortization per unit			1.67	10.00		1.31	7.84			1.45	8.68
East Texas/North Louisiana \| Compass
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates (Energy), Other Factors \| Mcfe		7,500,000,000							11.5
Oil
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Reference Price \| $ / bbl	95.04	95.04	95.04	95.04	59.21	59.21	59.21	99.08	99.08	99.08	99.08
Natural Gas
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Reference Price \| $ / MMBTU	3.60	3.60	3.60	3.60	3.06	3.06	3.06	4.24	4.24	4.24	4.24
Natural Gas Liquids
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Reference Price \| $ / bbl	38.64	38.64	38.64	38.64	21.50	21.50	21.50	43.58	43.58	43.58	43.58