Acquisition (Details) (USD $)	3 Months Ended		9 Months Ended			6 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended	6 Months Ended	9 Months Ended				6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jul. 02, 2014 Access Midstream Partners [Member]	Sep. 30, 2014 Access Midstream Partners Acquisition [Member]	Jul. 02, 2014 Access Midstream Partners Acquisition [Member]	Sep. 30, 2014 Access Midstream Partners Acquisition [Member]	Jul. 01, 2014 Access Midstream Partners Acquisition [Member]	Sep. 30, 2014 Access Midstream Partners Acquisition [Member] Selling, General and Administrative Expenses [Member]	Sep. 30, 2014 Access Midstream Partners Acquisition [Member] Interest Expense [Member]	Sep. 30, 2014 Access Midstream Partners Acquisition [Member] Income Loss From Equity Method Investment [Member]	Sep. 30, 2014 Access Midstream Partners Acquisition [Member] Customer Concentration Risk [Member]	Sep. 30, 2013 Access Midstream Partners Acquisition [Member] Pro Forma [Member]	Sep. 30, 2014 Access Midstream Partners Acquisition [Member] Pro Forma [Member]	Sep. 30, 2013 Access Midstream Partners Acquisition [Member] Pro Forma [Member]	Sep. 30, 2013 Access Midstream Partners Acquisition [Member] Pro Forma [Member] Customer Concentration Risk [Member]	Jun. 30, 2014 Access Midstream Partners Acquisition [Member] Pro Forma [Member] Customer Concentration Risk [Member]	Sep. 30, 2013 Access Midstream Partners Acquisition [Member] Pro Forma [Member] Customer Concentration Risk [Member]	Jul. 01, 2014 Access Midstream Partners Acquisition [Member] General Partner [Member]	Jul. 01, 2014 Access Midstream Partners Acquisition [Member] Consolidated Investments Held by Acquired Subsidiary [Member]	Jul. 01, 2014 Access Midstream Partners Acquisition [Member] Access Midstream Partners [Member]	Jul. 02, 2014 Access Midstream Partners L.P. (ACMP) [Member] Access Midstream Partners Acquisition [Member]	Jul. 01, 2014 Access Midstream Partners L.P. (ACMP) [Member] Access Midstream Partners Acquisition [Member] Limited Partner [Member]
Business Acquisition, Entity Acquired and Reason for Acquisition [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired																					50.00%
Number Of Limited Partner Units Received																								55,100,000
Business Acquisition, Cost of Acquired Entity, Cash Paid								$ 5,995,000,000
Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage																					100.00%				50.00%
Equity Interest In Acquiree, Fair Value						4,600,000,000
Gain on remeasurement of equity-method investment	2,522,000,000	0	2,522,000,000	0			2,500,000,000		2,500,000,000
Business Acquisition, Purchase Price Allocation [Abstract]
Accounts receivable										177,000,000
Other current assets										61,000,000
Investments										4,648,000,000
Property, plant and equipment - net										7,092,000,000
Goodwill	1,658,000,000		1,658,000,000		646,000,000					1,012,000,000
Other intangible assets										9,615,000,000
Current liabilities										(407,000,000)
Debt										(4,052,000,000)
Other noncurrent liabilities										(10,000,000)
Noncontrolling Interest																						(985,000,000)	(6,544,000,000)
Intangible Assets Disclosure [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life (years)								30 years								30 years
Percentage of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement										59.00%
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension								17 years
Business Acquisition, Goodwill, Expected Tax Deductible Amount										1,012,000,000
Business Acquisition, Pro Forma Information [Abstract]
Business Acquisition, Pro Forma Revenue															1,884,000,000	6,066,000,000	5,945,000,000	220,000,000	470,000,000	633,000,000
Business Acquisition, Pro Forma Net Income (Loss)															130,000,000	1,899,000,000	387,000,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual							300,000,000		300,000,000					257,000,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual							37,000,000		37,000,000
Business Combination, Acquisition Related Costs											15,000,000	9,000,000
Business Combination, Integration Related Costs													$ 19,000,000