Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
Income Statement [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ (143)	$ (283)	$ (745)		$ (413)
Revenues
Oil, Gas and NGL Sales		882	783	2,411		2,264
Income from Equity Method Investees		28	36	70		60
Total		910	819	2,481		2,324
Costs and Expenses
Production Expense		274	247	820		715
Exploration Expense		125	203	376		308
Depreciation, Depletion and Amortization		621	539	1,859		1,444
General and Administrative		95	109	293		308
Other Operating Expense, Net		45	188	66		310
Total		1,160	1,286	3,414		3,085
Operating Loss		(250)	(467)	(933)		(761)
Other Expense (Income)
(Gain) Loss on Commodity Derivative Instruments		(55)	(267)	53		(331)
Interest, Net of Amount Capitalized		86	71	242		183
Other Non-Operating (Income) Expense, Net		(1)	(12)	3		(20)
Total		30	(208)	298		(168)
Loss Before Income Taxes		(280)	(259)	(1,231)		(593)
Income Tax (Benefit) Provision		(137)	24	(486)		(180)
Net Income (Loss) Attributable to Noncontrolling Interest		1	0	1		0
Net Loss Including Noncontrolling Interests		$ (144)	$ (283)	$ (746)		$ (413)
Loss per share, basic (in dollars per share)		$ (0.33)	$ (0.67)	$ (1.73)	[1]	$ (1.05)
Loss per share, diluted (in dollars per share)		$ (0.33)	$ (0.67)	$ (1.73)	[1]	$ (1.05)
Weighted Average Number of Shares Outstanding
Basic (in shares)	[2]	430	420	430		392
Diluted (in shares)	[3]	430	420	430		392

[1] No pro forma adjustments were made for the period as the acquisition is included in the Company's historical results.

[2] The weighted average number of shares outstanding includes the weighted average shares of common stock issued in connection with the underwritten public offering of 24.15 million shares of Noble Energy common stock in first quarter 2015 and issued in connection with the exchange of approximately 41 million shares for all outstanding shares of Rosetta common stock on July 20, 2015.

[3] For all periods, all outstanding options and non-vested restricted shares have been excluded from the calculation of diluted loss per share as Noble Energy incurred a net loss. Therefore, inclusion of outstanding options and non-vested restricted shares in the calculation of diluted loss per share would be anti-dilutive.