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Income Taxes Narrative (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Dec. 31, 2017
Nov. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating Loss Carryforwards [Line Items]          
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration $ 403   $ 403    
Operating Loss Carryforwards, Expiration Date     Jan. 01, 2031    
Deferred Tax Liabilities, Gross 4,035   $ 4,035 $ 5,710  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 605   605    
Net operating losses and alternative minimum tax credit 683   683 472  
Valuation allowance (189)   (189) (118)  
Unrecognized Tax Benefits That Would Impact Effective Tax Rate, Ater Tax 576   576    
Proceeds from Income Tax Refunds 530   530    
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts 530   530    
State     (16) (34) $ (54)
Unrecognized Tax Benefits, Interest on Income Taxes Expense     3    
Income Tax Examination, Penalties and Interest Accrued $ 9   9    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 35.00%      
Tax Credit Carryforward, Valuation Allowance $ 186   186    
Deferred Income Tax Expense (Benefit)     (1,871) $ (177) $ 239
Operating Loss Carryforwards, Valuation Allowance 3   3    
Corporate Subsidiaries [Member]          
Operating Loss Carryforwards [Line Items]          
Net operating losses and alternative minimum tax credit 62   62    
Operating Loss Carryforwards 274   274    
Tax Cut and Jobs Act [Member]          
Operating Loss Carryforwards [Line Items]          
Deferred Income Tax Expense (Benefit)     (1,810)    
Net of federal tax [Member]          
Operating Loss Carryforwards [Line Items]          
State     $ 53    
Maximum [Member] | ETP Holdco and other corporate subsidiaries [Member]          
Operating Loss Carryforwards [Line Items]          
Operating Loss Carryforwards, Expiration Date     Dec. 31, 2037    
Maximum [Member] | Corporate Subsidiaries [Member]          
Operating Loss Carryforwards [Line Items]          
Operating Loss Carryforwards, Expiration Date     Dec. 31, 2037    
Minimum [Member] | Corporate Subsidiaries [Member]          
Operating Loss Carryforwards [Line Items]          
Operating Loss Carryforwards, Expiration Date     Jan. 01, 2018    
Reclassed to current income tax receivable within 12 months [Member]          
Operating Loss Carryforwards [Line Items]          
Net operating losses and alternative minimum tax credit 29   $ 29    
Net of federal tax [Member] | Corporate Subsidiaries [Member]          
Operating Loss Carryforwards [Line Items]          
Operating Loss Carryforwards 217   217    
Pennsylvania Constitution [Member]          
Operating Loss Carryforwards [Line Items]          
State     67    
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies 27   27    
Pennsylvania Constitution [Member] | Net of federal tax [Member]          
Operating Loss Carryforwards [Line Items]          
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies $ 21   $ 21