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Acquisitions And Divestitures (Narrative) (Details)
Share data in Millions, unless otherwise specified
3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended
Jun. 30, 2014
USD ($)
Sep. 30, 2013
USD ($)
Jun. 30, 2013
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2013
USD ($)
Jun. 30, 2014
Foreign Currency Derivatives [Member]
USD ($)
Jun. 30, 2014
Canadian Conventional Assets Divestiture [Member]
USD ($)
Jun. 30, 2014
Canadian Conventional Assets Divestiture [Member]
CAD
Mar. 31, 2014
Canadian Conventional Assets Divestiture [Member]
USD ($)
Mar. 31, 2014
Canadian Conventional Assets Divestiture [Member]
CAD
Sep. 30, 2014
Canadian Conventional Assets Divestiture [Member]
USD ($)
Aug. 29, 2014
LINN Energy [Member]
USD ($)
Sep. 30, 2014
LINN Energy [Member]
USD ($)
Sep. 30, 2014
EnLink And Partnership [Member]
Feb. 28, 2014
GeoSouthern Intermediate Holdings, LLC [Member]
USD ($)
acre
Sep. 30, 2014
GeoSouthern Intermediate Holdings, LLC [Member]
Mar. 07, 2014
Partnership [Member]
EnLink And Partnership [Member]
USD ($)
Sep. 30, 2014
Partnership [Member]
Gulf Coast Natural Gas Pipeline [Member]
Nov. 02, 2014
Partnership [Member]
Gulf Coast Natural Gas Pipeline [Member]
Forecast [Member]
USD ($)
Oct. 31, 2014
Partnership [Member]
Appalachian Compression, LLC and E2 Energy Services, LLC [Member]
Subsequent Event [Member]
USD ($)
Sep. 30, 2014
Partnership [Member]
Appalachian Compression, LLC and E2 Energy Services, LLC [Member]
Subsequent Event [Member]
Sep. 30, 2014
Partnership [Member]
Sep. 30, 2014
Partnership [Member]
Public Unitholders [Member]
Sep. 30, 2014
Partnership [Member]
EnLink [Member]
Mar. 07, 2014
EnLink [Member]
USD ($)
Sep. 30, 2014
EnLink [Member]
Sep. 30, 2014
EnLink [Member]
Public Unitholders [Member]
Sep. 30, 2014
EnLink [Member]
Sep. 30, 2014
EnLink [Member]
Partnership [Member]
Jun. 30, 2014
Term Loan [Member]
USD ($)
Business Acquisition [Line Items]                                                            
Cash payment to acquire interest                                       $ 163,000,000         $ 100,000,000          
Ownership percentage                                           52.00% 41.00% 7.00%   70.00% 30.00% 50.00% 50.00%  
Close date of acquisition                           Mar. 07, 2014   Feb. 28, 2014   Nov. 01, 2014     Oct. 01, 2014                  
Date of acquisition agreement                               Nov. 20, 2013                            
Aggregate purchase price                             6,000,000,000       235,000,000 193,000,000                    
Partnership common units value                                 2,825,000,000     30,000,000                    
Units issued for acquisition                                       1.0                    
Number of acres acquired                             82,000                              
Gains and losses on asset sales   (11,000,000)   1,072,000,000 (11,000,000)           1,100,000,000                                      
Gains and losses on assets sales after tax                     600,000,000   0                                  
Decrease in goodwill for sale of assets                     (700,000,000)                                      
Foreign currency exchange loss (84,000,000)                                                          
Loss on derivative           29,000,000                                                
Foreign earnings repatriated 2,800,000,000   2,000,000,000                                                      
Proceeds from property and equipment divestitures       5,202,000,000 316,000,000   2,800,000,000 3,125,000,000 142,000,000 155,000,000   2,300,000,000                                    
Proceeds after tax from property and equipment divestitures                       1,700,000,000                                    
Asset retirement obligation transferred       949,000,000 15,000,000           700,000,000 200,000,000                                    
Repayment of commercial paper 700,000,000     1,300,000,000                                                    
Long term debt repayment       $ 4,265,000,000                                                   $ 2,000,000,000