Oil and Natural Gas Property Transactions - Narrative (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) a well VPP	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) a well Compressor
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties	$ 1,406,000,000	$ 189,000,000	$ 5,813,000,000
Impairments of fixed assets and other	$ 838,000,000	194,000,000	88,000,000
Number of VPP Transactions | VPP	4
Noncontrolling Interest, Chesapeake Cleveland Tonkawa Limited Liability Company [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties		90,000,000
Other Customers [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties		66,000,000
Southwestern [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties			$ 4,975,000,000
Number Of Net Acres | a			413,000
RKI Exploration & Production, LLC [Member]
Business Acquisition [Line Items]
Number Of Gross Acres | a			440,000
Rice Drilling [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties			$ 233,000,000
Hilcorp Energy [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties			$ 133,000,000
Equipment, Number of Units | Compressor			61
Chesapeake Obligation [Member] | RKI Exploration & Production, LLC [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties			$ 450,000,000
Number Of Net Acres | a			137,000
Number of Wells, Gross | well			67
Interest Sold			22.00%
RKI Obligation [Member] | RKI Exploration & Production, LLC [Member]
Business Acquisition [Line Items]
Number Of Net Acres | a			203,000
Number of Wells, Gross | well			186
Interest Sold			48.00%
Corporate VPP [Member]
Business Acquisition [Line Items]
Property, Plant and Equipment, Additions	$ 259,000,000
Gain (Loss) on Disposition of Other Assets	0
VPP 6 East Texas and Texas Gulf Coast [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties			$ 63,000,000
Corporate Joint Venture [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties			379,000,000
JV Marcellus, Barnett, Utica, Eagle Ford, Mid-Continent [Member]
Business Acquisition [Line Items]
Proceeds from Divestiture of Interest in Joint Venture	7,000,000	$ 33,000,000	$ 33,000,000
Other, Barnett Shale Exit Costs,Termination of Gathering Agreement [Member]
Business Acquisition [Line Items]
Loss on Contract Termination	361,000,000
Payments for Restructuring	58,000,000
Impairments of fixed assets and other	361,000,000
Increase (Decrease) in Deferred Charges	58,000,000
Other, Barnett Shale Exit Costs, Other Property and Equipment [Member]
Business Acquisition [Line Items]
Impairments of fixed assets and other	284,000,000
Exploration and Production Equipment, Buildings and Land, Devonian Shale [Member]
Business Acquisition [Line Items]
Impairments of fixed assets and other	142,000,000
Barnett Shale [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties	$ 218,000,000
Number Of Net Acres | a	212,000
Devonian Shale [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties	$ 140,000,000
Number Of Net Acres | a	1,300,000
Wells | well	5,300
Number of VPP Transactions | VPP	1
Devonian Shale [Member] | Corporate VPP [Member]
Business Acquisition [Line Items]
Property, Plant and Equipment, Additions	$ 127,000,000
Haynesville Shale [Member]
Business Acquisition [Line Items]
Property, Plant and Equipment, Additions	85,000,000
Other Noncore [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties	$ 1,048,000,000
North Western Virginia and Southern Pennsylvania [Member] | Southwestern [Member]
Business Acquisition [Line Items]
Number of Wells, Gross | well			1,500
Marcellus and Utica Formations [Member] | Southwestern [Member]
Business Acquisition [Line Items]
Number of Wells, Gross | well			435