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Income Taxes Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration $ 292    
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 127    
Deferred Tax Liabilities, Gross 5,710 $ 4,945  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 596    
Net operating losses and alternative minimum tax credit 472 217  
Valuation allowance (118) (121)  
Unrecognized Tax Benefits That Would Impact Effective Tax Rate, Ater Tax 554    
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit $ 1    
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Other Information 0.6    
Proceeds from Income Tax Refunds $ 530    
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts 530    
State (34) $ (54) $ 78
Unrecognized Tax Benefits, Interest on Income Taxes Expense 1    
Income Tax Examination, Penalties and Interest Accrued 6    
Pennsylvania Constitution [Member]      
Operating Loss Carryforwards [Line Items]      
State 46    
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies 9    
Net of federal tax [Member] | Pennsylvania Constitution [Member]      
Operating Loss Carryforwards [Line Items]      
State 30    
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies $ 6    
Maximum [Member] | ETP Holdco and other corporate subsidiaries [Member]      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards, Expiration Date Dec. 31, 2035    
Minimum [Member] | Corporate Subsidiaries [Member]      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards, Expiration Date Jan. 01, 2017