Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Oil, NGL and Gas Sales	$ 1,100	$ 1,017	$ 2,273	$ 2,011
Income from Equity Method Investees and Other	130	42	243	84
Total	1,230	1,059	2,516	2,095
Costs and Expenses
Production Expense	292	283	613	586
Exploration Expense	29	30	64	72
Depreciation, Depletion and Amortization	465	503	933	1,031
Loss on Marcellus Shale Upstream Divestiture	0	2,322	0	2,322
Gain on Divestitures, Net	(78)	0	(666)	0
Asset Impairments	0	0	168	0
General and Administrative	105	103	209	202
Other Operating Expense, Net	74	118	144	147
Total	887	3,359	1,465	4,360
Operating Income (Loss)	343	(2,300)	1,051	(2,265)
Other (Income) Expense
Loss (Gain) on Commodity Derivative Instruments	249	(57)	328	(167)
Interest, Net of Amount Capitalized	73	96	146	183
Other Non-Operating Expense (Income), Net	11	(5)	24	(6)
Total	333	34	498	10
Income (Loss) Before Income Taxes	10	(2,334)	553	(2,275)
Income Tax Expense (Benefit)	16	(836)	(15)	(824)
Net (Loss) Income and Comprehensive (Loss) Income Including Noncontrolling Interests	(6)	(1,498)	568	(1,451)
Less: Net Income and Comprehensive Income Attributable to Noncontrolling Interests	17	14	37	25
Net (Loss) Income and Comprehensive Income (Loss) Attributable to Noble Energy	$ (23)	$ (1,512)	$ 531	$ (1,476)
Net (Loss) Income Attributable to Noble Energy per Common Share
Basic ($ per share)	$ (0.05)	$ (3.20)	$ 1.09	$ (3.27)
Diluted ($ per share)	$ (0.05)	$ (3.20)	$ 1.09	$ (3.27)
Weighted Average Number of Common Shares Outstanding
Basic (in shares)	484	472	485	452
Diluted (in shares)	484	472	487	452