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Debt Obligations Debt Obligations (Interest Rates & Maturities) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Jun. 30, 2018
Jan. 31, 2018
Dec. 31, 2017
Parent Company [Member]        
Deferred Finance Costs, Noncurrent, Net $ 27     $ 34
ETO [Member]        
Deferred Finance Costs, Noncurrent, Net 178     170
Sunoco LP [Member]        
Deferred Finance Costs, Noncurrent, Net 23     34
Transwestern [Member]        
Deferred Finance Costs, Noncurrent, Net $ (1)     $ (1)
6.375% Senior Notes due April 2023 [Member] | Sunoco LP [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.38%   6.375%  
Debt Instrument, Maturity Date Apr. 01, 2023      
6.25% Senior Notes due 2021 [Member] | Sunoco LP [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.25%   6.25%  
Debt Instrument, Maturity Date Apr. 15, 2021      
ETE 7.5% Senior Notes due 2020 [Member] | Parent Company [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.50%      
Debt Instrument, Maturity Date Oct. 15, 2020      
5.875% Senior Notes due January 15, 2024 [Member] | Parent Company [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.88%      
Debt Instrument, Maturity Date Jan. 15, 2024      
5.5% Senior Notes due June 1, 2027 [Member] | Parent Company [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.50%      
Debt Instrument, Maturity Date Jun. 01, 2027      
4.25% Senior Notes due March 15, 2023 [Member] | Parent Company [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.25%      
Debt Instrument, Maturity Date Mar. 15, 2023      
ETE Senior Secured Term Loan due February 2, 2024 [Member] | Parent Company [Member]        
Debt Instrument, Maturity Date Feb. 02, 2024      
ETE Senior Secured Revolving Credit Facility due March 24, 2022 [Member] | Parent Company [Member]        
Debt Instrument, Maturity Date Mar. 24, 2022      
2.50% Senior Notes due June 2018 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 2.50% 2.50%    
Debt Instrument, Maturity Date Jun. 15, 3028      
6.7% Senior Notes, due July 1, 2018 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.70% 6.70%    
Debt Instrument, Maturity Date Jul. 01, 2018      
9.7% Senior Notes, due March 15, 2019 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 9.70%      
Debt Instrument, Maturity Date Mar. 15, 2019      
9.0% Senior Notes due April 15, 2019 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 9.00%      
Debt Instrument, Maturity Date Apr. 15, 2019      
4.15% Senior Notes due October 1, 2020 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.15%      
Debt Instrument, Maturity Date Oct. 01, 2020      
Senior Notes 4.65% Due June 1, 2021 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.65%      
Debt Instrument, Maturity Date Jun. 01, 2021      
Senior Notes 5.20% Due February 1, 2022 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.20%      
Debt Instrument, Maturity Date Feb. 01, 2022      
3.6% Senior Notes due February 1, 2023 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 3.60%      
Debt Instrument, Maturity Date Feb. 01, 2023      
4.9% Senior Notes due February 1, 2024 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.90%      
Debt Instrument, Maturity Date Feb. 01, 2024      
6.625% Senior Notes, due October 15, 2036 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.63%      
Debt Instrument, Maturity Date Oct. 15, 2036      
4.90% Senior Notes due March 2035 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.90%      
Debt Instrument, Maturity Date Mar. 15, 2035      
7.5% Senior Notes, due July 1, 2038 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.50%      
Debt Instrument, Maturity Date Jul. 01, 2038      
Senior Notes 6.05% Due June 1, 2041 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.05%      
Debt Instrument, Maturity Date Jun. 01, 2041      
Senior Notes 6.50% Due February 1, 2042 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.50%      
Debt Instrument, Maturity Date Feb. 01, 2042      
5.15% Senior Notes due February 1, 2043 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.15%      
Debt Instrument, Maturity Date Feb. 01, 2043      
5.95% Senior Notes due October 1, 2043 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.95%      
Debt Instrument, Maturity Date Oct. 01, 2043      
5.15% Senior Notes due March 2045 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.15%      
Debt Instrument, Maturity Date Mar. 15, 2045      
6.125% Senior Notes due December 2045 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.13%      
Debt Instrument, Maturity Date Dec. 15, 2045      
5.30% Senior Notes due April 2047 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.30%      
Debt Instrument, Maturity Date Apr. 01, 2047      
5.40% Senior Notes due October 1, 2047 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.40%      
Debt Instrument, Maturity Date Oct. 01, 2047      
7.00% Senior Notes, due June 15, 2018 [Member] | Panhandle [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.00% 7.00%    
Debt Instrument, Maturity Date Jun. 15, 2018      
8.125% Senior Notes, due June 1, 2019 [Member] | Panhandle [Member]        
Debt Instrument, Interest Rate, Stated Percentage 8.125%      
Debt Instrument, Maturity Date Jun. 01, 2019      
7.00% Senior Notes, due July 15, 2029 [Member] | Panhandle [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.00%      
Debt Instrument, Maturity Date Jul. 15, 2029      
Term Loan due February 23, 2015 [Member] | Panhandle [Member]        
Debt Instrument, Interest Rate, Stated Percentage 1.84%      
Debt Instrument, Maturity Date Feb. 23, 2015      
5.75% Senior Notes due September 1, 2020 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.75%      
Debt Instrument, Maturity Date Sep. 01, 2020      
5.875% Senior Notes due April 1, 2022 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.88%      
Debt Instrument, Maturity Date Mar. 01, 2022      
4.5% Senior Notes due November 1, 2023 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.50%      
Debt Instrument, Maturity Date Nov. 01, 2023      
5.0% Senior Notes due October 1, 2022 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.00%      
Debt Instrument, Maturity Date Oct. 01, 2022      
7.60% Senior Notes, due February 1, 2024 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.60%      
Debt Instrument, Maturity Date Feb. 01, 2024      
7.60% Senior Notes, due February 1, 2024 [Member] | Panhandle [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.60%      
Debt Instrument, Maturity Date Feb. 01, 2024      
4.05% Senior Notes due March 2025 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.05%      
Debt Instrument, Maturity Date Mar. 15, 2025      
4.75% Senior Notes due January 2026 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.75%      
Debt Instrument, Maturity Date Jan. 15, 2026      
8.25% Senior Notes, due November 14, 2029 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 8.25%      
Debt Instrument, Maturity Date Nov. 15, 2029      
8.25% Senior Notes, due November 14, 2029 [Member] | Panhandle [Member]        
Debt Instrument, Interest Rate, Stated Percentage 8.25%      
Debt Instrument, Maturity Date Nov. 14, 2029      
7.2% Junior Subordinated Notes due November 21, 2066 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.20%      
Debt Instrument, Maturity Date Nov. 01, 2066      
9.00% Debentures, due 2024 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 9.00%      
Debt Instrument, Maturity Date Nov. 01, 2024      
5.50% Senior Notes, due February 15, 2020 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.50%      
Debt Instrument, Maturity Date Feb. 15, 2020      
4.40% Senior Notes due April 2021 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.40%      
Debt Instrument, Maturity Date Apr. 01, 2021      
Senior Note 4.65% Due February 15, 2022 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.65%      
Debt Instrument, Maturity Date Feb. 15, 2022      
3.45% Senior Notes due January 2023 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 3.45%      
Debt Instrument, Maturity Date Feb. 01, 2023      
4.25% Senior Notes due April 1, 2024 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.25%      
Debt Instrument, Maturity Date Apr. 01, 2024      
5.95% Senior Notes due December 2025 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.95%      
Debt Instrument, Maturity Date Dec. 01, 2025      
3.90% Senior Notes due July 15, 2026 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 3.90%      
Debt Instrument, Maturity Date Jul. 15, 2026      
4.20% Senior Notes due April 2027 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.20%      
Debt Instrument, Maturity Date Apr. 15, 2027      
4.00% Senior Notes due October 1, 2027 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.00%      
Debt Instrument, Maturity Date Oct. 01, 2027      
6.85% Senior Notes, due February 15, 2040 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.85%      
Debt Instrument, Maturity Date Feb. 15, 2040      
Senior Note 6.10%, due February 15, 2042 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.10%      
Debt Instrument, Maturity Date Feb. 15, 2042      
4.95% Senior Notes due January 2043 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.95%      
Debt Instrument, Maturity Date Jan. 15, 2043      
5.30% Senior Notes due April 1, 2044 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.30%      
Debt Instrument, Maturity Date Apr. 01, 2044      
5.35% Senior Notes due May 15, 2045 [Member] | ETO [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.35%      
Debt Instrument, Maturity Date May 15, 2045      
5.36% Senior Unsecured Notes, due December 9, 2020 [Member] | Transwestern [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.36%      
Debt Instrument, Maturity Date Dec. 09, 2020      
5.89% Senior Unsecured Notes, due May 24, 2022 [Member] | Transwestern [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.89%      
Debt Instrument, Maturity Date May 24, 2022      
5.66% Senior Unsecured Notes, due December 9, 2024 [Member] | Transwestern [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.66%      
Debt Instrument, Maturity Date Dec. 09, 2024      
6.16% Senior Unsecured Notes, due May 24, 2037 [Member] | Transwestern [Member]        
Debt Instrument, Interest Rate, Stated Percentage 6.16%      
Debt Instrument, Maturity Date May 24, 2037