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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items] |  |  |
Expense related to carbon offset credits | $ 116,000,000 | $ 95,000,000 |
Derivative contracts, net | 47,000,000 | 17,000,000 |
Depreciation and amortization expense related to property and equipment | 2,107,000,000 | 1,998,000,000 | $ 2,312,000,000
Amortization of capitalized software | 307,000,000 | 301,000,000 | 304,000,000
Net book value of capitalized software | 891,000,000 | 876,000,000 |
Fuel card obligation | 1,100,000,000 | 1,100,000,000 |
Advertising expense | 302,000,000 | $ 198,000,000 | $ 119,000,000
Fuel Card Obligation |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Purchasing card maximum limit | $ 1,100,000,000 |  |
Minimum |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Estimated residual value (percent) | 5.00% |  |
Maximum |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Estimated residual value (percent) | 10.00% |  |
Software and software development costs | Minimum |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Estimated useful life | 3 years |  |
Software and software development costs | Maximum |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Estimated useful life | 15 years |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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