Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Oil, Gas and NGL Sales	$ 4,060	$ 3,389	$ 3,093
Income from Equity Method Investees and Other	196	102	90
Total Revenues	4,256	3,491	3,183
Costs and Expenses
Production Expense	1,141	1,100	996
Exploration Expense	188	925	488
Depreciation, Depletion and Amortization	2,053	2,454	2,131
General and Administrative	415	399	396
Loss on Marcellus Shale Upstream Divestiture	2,379	0	0
Asset Impairments	70	92	533
Goodwill Impairment	0	0	779
Other Operating (Income) Expense, Net	(188)	(103)	332
Total Operating Expenses	6,058	4,867	5,655
Operating Loss	(1,802)	(1,376)	(2,472)
Other Expense (Income)
(Gain) Loss on Commodity Derivative Instruments	(63)	139	(501)
Loss (Gain) on Extinguishment of Debt	98	(80)	0
Interest, Net of Amount Capitalized	354	328	263
Other Non-Operating Expense (Income), Net	0	9	(15)
Total Other Expense (Income)	389	396	(253)
Loss Before Income Taxes	(2,191)	(1,772)	(2,219)
Income Tax (Benefit) Provision	(1,141)	(787)	222
Net Loss Including Noncontrolling Interests	(1,050)	(985)	(2,441)
Less: Net Income Attributable to Noncontrolling Interests	68	13	0
Net Loss Attributable to Noble Energy	$ (1,118)	$ (998)	$ (2,441)
Net Loss Attributable to Noble Energy per Share of Common Stock
Basic and Diluted (in dollars per share)	$ (2.38)	$ (2.32)	$ (6.07)
Weighted Average Number of Shares Outstanding
Basic and Diluted (in shares)	469	430	402