Acquisitions And Divestitures (Tables)

12 Months Ended

Dec. 31, 2015

WPX Property Acquisition [Member]

Business Acquisition [Line Items]

Summary Of Consideration Paid And Fair Value Of Assets Acquired And Liabilities Assumed

Consideration:
Cash	$	270
Recognized amounts of identifiable assets acquired and liabilities assumed:
Assets acquired:
Proved natural gas and oil properties		31
Unproved natural gas and oil properties		114
Intangible asset		109
Gathering system		22
Other		1
Total assets acquired		277
Liabilities assumed:
Asset retirement obligations		(7)
Total liabilities assumed		(7)
	$	270

Chesapeake Property Acquisition [Member]

Business Acquisition [Line Items]

Summary Of Consideration Paid And Fair Value Of Assets Acquired And Liabilities Assumed

Consideration:
Cash	$	4,949
Recognized amounts of identifiable assets acquired and liabilities assumed:
Assets acquired:
Proved natural gas and oil properties		1,418
Unproved natural gas and oil properties		3,573
Other property and equipment		33
Inventory		3
Total assets acquired		5,027
Liabilities assumed:
Asset retirement obligations		(42)
Other liabilities		(36)
Total liabilities assumed		(78)
	$	4,949

Summary Of Consolidated Results Of Operations On Pro Forma Basis

	For the years ended
	December 31,
	2014		2013
	(in millions) (unaudited)
Revenues	$	4,439	$	3,713
Net income attributable to common stock		803		594
Earnings per share
Basic	$	2.11	$	1.56
Diluted		2.10		1.56