XML 96 R84.htm IDEA: XBRL DOCUMENT v3.5.0.2
Impairments - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Property, Plant and Equipment [Line Items]          
Impairment of oil and natural gas properties $ 433 $ 1,045 $ 5,416 $ 2,331 $ 15,407
Effects of Cash Flow Hedges Considered in Calculation Ceiling Limitation, Amount 154   184    
Impairments of fixed assets and other 751   $ 79 $ 795 $ 167
Prior Quarter Adjustment [Member]          
Property, Plant and Equipment [Line Items]          
Impairment of oil and natural gas properties 14        
Other, Barnett Shale Exit Costs,Termination of Gathering Agreement [Member]          
Property, Plant and Equipment [Line Items]          
Impairments of fixed assets and other 334        
Other, Barnett Shale Exit Costs, Other Property and Equipment          
Property, Plant and Equipment [Line Items]          
Impairments of fixed assets and other 282        
Exploration and Production Equipment, Buildings and Land, Devonian Shale [Member]          
Property, Plant and Equipment [Line Items]          
Impairments of fixed assets and other $ 134