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v3.19.3.a.u2

Estimates, Significant Accounting Policies and Balance Sheet Detail (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019
Impairment losses |  |  |  | $ 74 | $ 431 | $ 1,039 |
Operating Lease, Liability |  |  |  | 961 |  |  |
Operating Lease, Right-of-Use Asset |  | $ 0 |  | 1,000 | 0 |  | $ 889
Asset Retirement Obligation |  | 193 |  | 247 | 193 |  |
Costs Incurred, Asset Retirement Obligation Incurred |  |  |  | 5 | 13 | 9 |
Tangible Asset Impairment Charges |  |  |  | 9 | 127 |  |
Asset Retirement Obligation, Legally Restricted Assets, Fair Value |  | 26 |  | 31 | 26 |  |
Long-term Debt, Fair Value |  | 45,060 |  | 54,790 | 45,060 |  |
Impairment losses | $ (12) | (9) |  | (21) | (378) |  |
Goodwill acquired |  |  |  | 307 | 495 |  |
Goodwill |  | 4,885 | $ 4,768 | 5,167 | 4,885 | 4,768 |
Long-term Debt |  | 46,028 |  | 51,054 | 46,028 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net |  |  |  | 0 |  |  |
Midstream [Member] |  |  |  |  |  |  |
Impairment losses |  | 378 |  | (9) | (378) |  |
Goodwill acquired |  |  |  | 0 | 0 |  |
Goodwill |  | 492 | 870 | 483 | 492 | 870 |
Other Segments [Member] |  |  |  |  |  |  |
Impairment losses |  |  | (452) | 0 | 0 |  |
Goodwill acquired |  |  |  | 35 | 0 |  |
Goodwill |  | 149 | 402 | 184 | 149 | 402 |
Investment In Sunoco LP [Member] |  |  |  |  |  |  |
Impairment losses |  |  | (387) | 0 | 0 |  |
Goodwill acquired |  |  |  | 0 | 129 |  |
Goodwill |  | 1,559 | 1,430 | 1,555 | 1,559 | 1,430 |
Retail Marketing [Member] |  |  |  |  |  |  |
Excise Taxes Collected |  |  |  | 386 | 370 | $ 234 |
Sunoco LP [Member] |  |  |  |  |  |  |
Impairment losses |  |  |  | 47 |  |  |
Inventory Write-down |  |  |  |  | 85 |  |
Long-term Debt |  | 2,984 |  | 3,071 | $ 2,984 |  |
USAC [Member] |  |  |  |  |  |  |
Impairment losses |  |  |  | 6 |  |  |
SemGroup [Member] |  |  |  |  |  |  |
Goodwill acquired |  |  |  | 265 |  |  |
Fair value exceeding carrying value by less than 20% [Member] |  |  |  |  |  |  |
Goodwill |  |  |  | 380 |  |  |
Customer relationships, contracts and agreements (3 to 46 years) |  |  |  |  |  |  |
Impairment of Intangible Assets (Excluding Goodwill) |  | $ 30 |  | $ 17 |  |  |
Continuing Operations [Member] | Investment In Sunoco LP [Member] |  |  |  |  |  |  |
Impairment losses |  |  | $ (102) |  |  |  |

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