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Debt Obligations Debt Obligations (Schedule Of Debt Obligations) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Other Long-term Debt $ 3 $ 2
Long-term Debt 51,438 51,054
Current maturities of long-term debt 21 26
Long-term debt, less current maturities 51,417 51,028
Parent Company [Member]    
Debt Instrument [Line Items]    
Long-term Debt 72 124
Parent Company [Member] | ETE 7.5% Senior Notes due 2020 [Member]    
Debt Instrument [Line Items]    
Senior Notes [1] $ 0 52
Long-term Debt, Description 7.50% Senior Notes due October 15, 2020 (1)  
Parent Company [Member] | 5.875% Senior Notes due January 15, 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 23 23
Long-term Debt, Description 5.875% Senior Notes due January 15, 2024  
Parent Company [Member] | 5.5% Senior Notes due June 1, 2027 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 44 44
Long-term Debt, Description 5.50% Senior Notes due June 1, 2027  
Parent Company [Member] | 4.25% Senior Notes due March 15, 2023 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 5 5
Long-term Debt, Description 4.25% Senior Notes due March 15, 2023  
ETO [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unamortized Discount (Premium), Net $ (17) (5)
Deferred Finance Costs, Noncurrent, Net (215) (207)
Long-term Debt 42,654 42,120
ETO [Member] | 5.875% Senior Notes due January 15, 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,127 1,127
Long-term Debt, Description 5.875% Senior Notes due January 15, 2024  
ETO [Member] | 5.5% Senior Notes due June 1, 2027 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 956 956
Long-term Debt, Description 5.50% Senior Notes due June 1, 2027  
ETO [Member] | 4.25% Senior Notes due March 15, 2023 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 995 995
Long-term Debt, Description 4.25% Senior Notes due March 15, 2023  
ETO [Member] | 7.60% Senior Notes, due February 1, 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 277 277
Long-term Debt, Description 7.60% Senior Notes due February 1, 2024  
ETO [Member] | 4.05% Senior Notes due March 2025 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 4.05% Senior Notes due March 15, 2025  
ETO [Member] | 4.75% Senior Notes due January 2026 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 4.75% Senior Notes due January 15, 2026  
ETO [Member] | 8.25% Senior Notes, due November 14, 2029 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 267 267
Long-term Debt, Description 8.25% Senior Notes due November 15, 2029  
ETO [Member] | 4.90% Senior Notes due March 2035 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 500 500
Long-term Debt, Description 4.90% Senior Notes due March 15, 2035  
ETO [Member] | 6.625% Senior Notes, due October 15, 2036 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 400 400
Long-term Debt, Description 6.625% Senior Notes due October 15, 2036  
ETO [Member] | 5.80% Senior Notes due 2038 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 500 500
Long-term Debt, Description 5.80% Senior Notes due June 15, 2038  
ETO [Member] | 7.5% Senior Notes, due July 1, 2038 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 550 550
Long-term Debt, Description 7.50% Senior Notes due July 1, 2038  
ETO [Member] | Senior Notes 6.05% Due June 1, 2041 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 700 700
Long-term Debt, Description 6.05% Senior Notes due June 1, 2041  
ETO [Member] | Senior Notes 6.50% Due February 1, 2042 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 6.50% Senior Notes due February 1, 2042  
ETO [Member] | 5.15% Senior Notes due February 1, 2043 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 450 450
Long-term Debt, Description 5.15% Senior Notes due February 1, 2043  
ETO [Member] | 5.95% Senior Notes due October 1, 2043 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 450 450
Long-term Debt, Description 5.95% Senior Notes due October 1, 2043  
ETO [Member] | 5.15% Senior Notes due March 2045 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 5.15% Senior Notes due March 15, 2045  
ETO [Member] | 6.125% Senior Notes due December 2045 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 6.125% Senior Notes due December 15, 2045  
ETO [Member] | 5.30% Senior Notes due April 2047 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 900 900
Long-term Debt, Description 5.30% Senior Notes due April 15, 2047  
ETO [Member] | 5.40% Senior Notes due October 1, 2047 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,500 1,500
Long-term Debt, Description 5.40% Senior Notes due October 1, 2047  
ETO [Member] | 6.0% Senior Notes due 2048 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 6.00% Senior Notes due June 15, 2048  
ETO [Member] | 6.25% Senior Notes due 2049 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,750 1,750
Long-term Debt, Description 6.25% Senior Notes due April 15, 2049  
ETO [Member] | 7.2% Junior Subordinated Notes due November 21, 2066 [Member]    
Debt Instrument [Line Items]    
Junior Subordinated Notes $ 546 546
Long-term Debt, Description Floating Rate Junior Subordinated Notes due November 1, 2066  
ETO [Member] | ETO Term Loan [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 2,000 2,000
Long-term Debt, Description ETO $2.00 billion Term Loan facility due October 2022  
ETO [Member] | ETO Credit Facility due December 2022 [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 3,103 4,214
Long-term Debt, Description ETO $5.00 billion Revolving Credit Facility due December 2023  
ETO [Member] | 9.00% Debentures, due 2024 [Member]    
Debt Instrument [Line Items]    
Subordinated Debt $ 65 65
Long-term Debt, Description 9.00% Debentures due November 1, 2024  
ETO [Member] | 5.50% Senior Notes, due February 15, 2020 [Member]    
Debt Instrument [Line Items]    
Senior Notes [1] $ 0 250
Long-term Debt, Description 5.50% Senior Notes due February 15, 2020 (1)  
ETO [Member] | Senior Note 4.65% Due February 15, 2022 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 300 300
Long-term Debt, Description 4.65% Senior Notes due February 15, 2022  
ETO [Member] | 3.45% Senior Notes due January 2023 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 350 350
Long-term Debt, Description 3.45% Senior Notes due January 15, 2023  
ETO [Member] | 6.85% Senior Notes, due February 15, 2040 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 250 250
Long-term Debt, Description 6.85% Senior Notes due February 15, 2040  
ETO [Member] | 4.25% Senior Notes due April 1, 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 500 500
Long-term Debt, Description 4.25% Senior Notes due April 1, 2024  
ETO [Member] | 4.5% Senior Notes due 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 750 750
Long-term Debt, Description 4.50% Senior Notes due April 15, 2024  
ETO [Member] | 5.95% Senior Notes due December 2025 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 400 400
Long-term Debt, Description 5.95% Senior Notes due December 1, 2025  
ETO [Member] | 3.90% Senior Notes due July 15, 2026 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 550 550
Long-term Debt, Description 3.90% Senior Notes due July 15, 2026  
ETO [Member] | 4.20% Senior Notes due April 2027 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 600 600
Long-term Debt, Description 4.20% Senior Notes due April 15, 2027  
ETO [Member] | 4.00% Senior Notes due October 1, 2027 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 750 750
Long-term Debt, Description 4.00% Senior Notes due October 1, 2027  
ETO [Member] | 4.95% Senior Notes due 2028 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 4.95% Senior Notes due June 15, 2028  
ETO [Member] | 5.25% Senior Notes due 2029 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,500 1,500
Long-term Debt, Description 5.25% Senior Notes due April 15, 2029  
ETO [Member] | Senior Note 6.10%, due February 15, 2042 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 300 300
Long-term Debt, Description 6.10% Senior Notes due February 15, 2042  
ETO [Member] | 5.30% Senior Notes due April 1, 2044 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 700 700
Long-term Debt, Description 5.30% Senior Notes due April 1, 2044  
ETO [Member] | 5.35% Senior Notes due May 15, 2045 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 800 800
Long-term Debt, Description 5.35% Senior Notes due May 15, 2045  
ETO [Member] | 4.95% Senior Notes due January 2043 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 350 350
Long-term Debt, Description 4.95% Senior Notes due January 15, 2043  
ETO [Member] | 5.75% Senior Notes due September 1, 2020 [Member]    
Debt Instrument [Line Items]    
Senior Notes [1] $ 0 400
Long-term Debt, Description 5.75% Senior Notes due September 1, 2020 (1)  
ETO [Member] | 4.15% Senior Notes due October 1, 2020 [Member]    
Debt Instrument [Line Items]    
Senior Notes [1] $ 0 1,050
Long-term Debt, Description 4.15% Senior Notes due October 1, 2020 (1)  
ETO [Member] | 5.875% Senior Notes due April 1, 2022 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 900 900
Long-term Debt, Description 5.875% Senior Notes due March 1, 2022  
ETO [Member] | 4.5% Senior Notes due November 1, 2023 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 600 600
Long-term Debt, Description 4.50% Senior Notes due November 1, 2023  
ETO [Member] | 4.9% Senior Notes due February 1, 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 350 350
Long-term Debt, Description 4.90% Senior Notes due February 1, 2024  
ETO [Member] | Senior Notes 4.65% Due June 1, 2021 [Member]    
Debt Instrument [Line Items]    
Senior Notes [2] $ 800 800
Long-term Debt, Description 4.65% Senior Notes due June 1, 2021 (2)  
ETO [Member] | Senior Notes 5.20% Due February 1, 2022 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 5.20% Senior Notes due February 1, 2022  
ETO [Member] | 5.0% Senior Notes due October 1, 2022 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 700 700
Long-term Debt, Description 5.00% Senior Notes due October 1, 2022  
ETO [Member] | 3.6% Senior Notes due February 1, 2023 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 800 800
Long-term Debt, Description 3.60% Senior Notes due February 1, 2023  
ETO [Member] | 4.20% Senior Notes due 2023 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 500 500
Long-term Debt, Description 4.20% Senior Notes due September 15, 2023  
ETO [Member] | ETO 364-day Credit Facility due November 2019 [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 0  
ETO [Member] | 7.5% Senior Notes due October 15, 2020 [Member]    
Debt Instrument [Line Items]    
Senior Notes [1] $ 0 1,135
Long-term Debt, Description 7.50% Senior Notes due October 15, 2020 (1)  
ETO [Member] | 4.40% Senior Notes due April 2021 [Member]    
Debt Instrument [Line Items]    
Senior Notes [2] $ 600 600
Long-term Debt, Description 4.40% Senior Notes due April 1, 2021 (2)  
ETO [Member] | 2.9% Senior Notes due May 15, 2025    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 0
Long-term Debt, Description 2.90% Senior Notes due May 15, 2025  
ETO [Member] | 3.75 Senior Notes due May 15, 2030    
Debt Instrument [Line Items]    
Senior Notes $ 1,500 0
Long-term Debt, Description 3.75% Senior Note due May 15, 2030  
ETO [Member] | 5.00% Senior Notes due May 15, 2050    
Debt Instrument [Line Items]    
Senior Notes $ 2,000 0
Long-term Debt, Description 5.00% Senior Notes due May 15, 2050  
Bakken Project [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unamortized Discount (Premium), Net $ (3) (3)
Deferred Finance Costs, Noncurrent, Net (13) (16)
Long-term Debt 2,484 2,481
Bakken Project [Member] | 3.625% Senior Notes due 2022 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 650 650
Long-term Debt, Description 3.625% Senior Notes due April 1, 2022  
Bakken Project [Member] | 3.90% Senior Notes due 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 1,000 1,000
Long-term Debt, Description 3.90% Senior Notes due April 1, 2024  
Bakken Project [Member] | 4.625% Senior Notes due 2029 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 850 850
Long-term Debt, Description 4.625% Senior Notes due April 1, 2029  
Sunoco LP [Member]    
Debt Instrument [Line Items]    
Capital Lease Obligations $ 103 135
Deferred Finance Costs, Noncurrent, Net (27) (26)
Long-term Debt 3,112 3,071
Sunoco LP [Member] | 6.00% Senior Notes due April 15, 2027 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 600 600
Long-term Debt, Description 6.00% Senior Notes Due April 15, 2027  
Sunoco LP [Member] | Sunoco LP $1.5 billion Revolving Credit Facility due July 2023 [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 0 162
Long-term Debt, Description Sunoco LP $1.50 billion Revolving Credit Facility due July 2023  
Sunoco LP [Member] | 5.875% senior notes due 2028 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 400 400
Long-term Debt, Description 5.875% Senior Notes Due March 15, 2028  
Sunoco LP [Member] | 4.875% senior notes due 2023 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 436 1,000
Long-term Debt, Description 4.875% Senior Notes Due January 15, 2023  
Sunoco LP [Member] | 5.500% senior notes due 2026 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 800 800
Long-term Debt, Description 5.50% Senior Notes Due February 15, 2026  
Sunoco LP [Member] | 4.50% Senior Notes due May 15, 2029    
Debt Instrument [Line Items]    
Senior Notes $ 800 0
Long-term Debt, Description 4.50% Senior Notes due May 15, 2029  
Transwestern [Member]    
Debt Instrument [Line Items]    
Deferred Finance Costs, Noncurrent, Net $ 0 (1)
Long-term Debt 400 574
Transwestern [Member] | 5.36% Senior Unsecured Notes, due December 9, 2020 [Member]    
Debt Instrument [Line Items]    
Senior Notes [1] $ 0 175
Long-term Debt, Description 5.36% Senior Notes due December 9, 2020 (1)  
Transwestern [Member] | 5.89% Senior Unsecured Notes, due May 24, 2022 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 150 150
Long-term Debt, Description 5.89% Senior Notes due May 24, 2022  
Transwestern [Member] | 5.66% Senior Unsecured Notes, due December 9, 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 175 175
Long-term Debt, Description 5.66% Senior Notes due December 9, 2024  
Transwestern [Member] | 6.16% Senior Unsecured Notes, due May 24, 2037 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 75 75
Long-term Debt, Description 6.16% Senior Notes due May 24, 2037  
Panhandle [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unamortized Discount (Premium), Net $ 10 11
Long-term Debt 245 246
Panhandle [Member] | 7.60% Senior Notes, due February 1, 2024 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 82 82
Long-term Debt, Description 7.60% Senior Notes due February 1, 2024  
Panhandle [Member] | 8.25% Senior Notes, due November 14, 2029 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 33 33
Long-term Debt, Description 8.25% Senior Notes due November 15, 2029  
Panhandle [Member] | 7.2% Junior Subordinated Notes due November 21, 2066 [Member]    
Debt Instrument [Line Items]    
Junior Subordinated Notes $ 54 54
Long-term Debt, Description Floating Rate Junior Subordinated Notes due November 1, 2066  
Panhandle [Member] | 7.00% Senior Notes, due July 15, 2029 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 66 66
Long-term Debt, Description 7.00% Senior Notes due July 15, 2029  
USA Compression Partners, LP [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 474 403
Deferred Finance Costs, Noncurrent, Net (22) (26)
Long-term Debt $ 1,927 1,852
Long-term Debt, Description USAC $1.60 billion Revolving Credit Facility due April 2023  
USA Compression Partners, LP [Member] | 6.875% Senior notes due April 2026 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 725 725
Long-term Debt, Description 6.875% Senior Notes due April 1, 2026  
USA Compression Partners, LP [Member] | 6.875% Senior Notes due September 2027 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 750 750
Long-term Debt, Description 6.875% Senior Notes due September 1, 2027  
SemGroup [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unamortized Discount (Premium), Net $ 0 1
Deferred Finance Costs, Noncurrent, Net (2) (3)
Long-term Debt 541 584
SemGroup [Member] | HFOTCO Tax Exempt Notes due 2050 [Member]    
Debt Instrument [Line Items]    
Senior Notes $ 225 225
Long-term Debt, Description HFOTCO Tax Exempt Notes due 2050  
SemGroup [Member] | Energy Transfer Canada Revolver    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 57 92
Long-term Debt, Description Energy Transfer Canada Revolver due February 25, 2024  
SemGroup [Member] | Energy Transfer Canada Term Loan    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 261 $ 269
Long-term Debt, Description Energy Transfer Canada Term Loan A due February 25, 2024  
[1] As of December 31, 2019, these notes were classified as long-term as management had the intent and ability to refinance the borrowings on a long-term basis. The notes were redeemed in January 2020.(2)As of December 31, 2020, these notes were classified as long-term as management had the intent and ability to refinance the borrowings on a long-term basis.
[2] As of December 31, 2020, these notes were classified as long-term as management had the intent and ability to refinance the borrowings on a long-term basis.