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Regulatory Matters, Commitments, Contingencies And Environmental Liabilities Narrative (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2017 USD ($)
Lessee, Operating Lease, Term of Contract | 15 years |  |
Operating Leases, Rent Expense, Contingent Rentals | $ 1,000,000 | $ 4,000,000 |
Loss Contingency Accrual, at Carrying Value | 30,000,000 |  | $ 33,000,000
Amounts recorded in balance sheets for contingencies and current litigation not disclosed | 0 |  |
Payments for Environmental Liabilities | 6,000,000 | $ 2,000,000 |
Accrual for Environmental Loss Contingencies | $ 380,000,000 |  | $ 372,000,000
Sunoco, Inc. [Member] |  |  |
Loss Contingency, Pending Claims, Number | 6 |  |
Proposed Environmental Penalty | $ 200,000 |  |
Williams [Member] |  |  |
Loss on Contract Termination for Default | 410,000,000 |  |
Loss Contingency, Damages Sought, Value | 10,000,000,000 |  |
Rover Pipeline LLC [Member] |  |  |
Proposed Environmental Penalty | $ 2,600,000 |  |
Sunoco [Member] |  |  |
Site Contingency, Number of Sites Needing Remediation | 50 |  |
Federal [Member] | Sunoco Pipeline L.P. [Member] |  |  |
Proposed Environmental Penalty | $ 7,000,000 |  |
State and Local Jurisdiction [Member] | Sunoco Pipeline L.P. [Member] |  |  |
Proposed Environmental Penalty | 1,000,000 |  |
Compensatory Damages [Member] |  |  |
Gain Contingency, Unrecorded Amount | 319,000,000 |  |
Final Judgement [Member] |  |  |
Gain Contingency, Unrecorded Amount | 536,000,000 |  |
Expense Reimbursement [Member] |  |  |
Gain Contingency, Unrecorded Amount | 1,000,000 |  |
Disgorgement [Member] |  |  |
Gain Contingency, Unrecorded Amount | 595,000,000 |  |
4.875% senior notes due 2023 [Member] | Sunoco LP [Member] |  |  |
Senior Notes | $ 1,000,000,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.875% |  |
5.500% senior notes due 2026 [Member] | Sunoco LP [Member] |  |  |
Senior Notes | $ 800,000,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.50% |  |
5.875% senior notes due 2028 [Member] | Sunoco LP [Member] |  |  |
Senior Notes | $ 400,000,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.875% |  |
Minimum [Member] |  |  |
Lessee, Operating Lease, Term of Contract | 5 years |  |
Maximum [Member] |  |  |
Lessee, Operating Lease, Term of Contract | 40 years |  |

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- Definition The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77895616&loc=d3e36728-112689 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=77910666&loc=d3e35050-112683 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84164451&loc=d3e36991-112694 + Details
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