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Revenue - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 23, 2018 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenue from Contract with Customer [Abstract] |  |  |  |
Capitalized Contract Cost, Amortization |  | $ 29 | $ 22 | $ 21
7-Eleven Transaction [Member] |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Discontinued Operation, Period of Continuing Involvement after Disposal | 15 years |  |  |
7-Eleven |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration Risk, Customer |  | 7-Eleven, Inc. accounts for approximately 20% of both total revenues and motor fuel gallons sold. |  |

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- Definition Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482861/275-10-50-20 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482861/275-10-50-16 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482861/275-10-50-18 + Details
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