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Property, Equipment, and Capitalized Software, Net - Summary of Property, Equipment, and Capitalized Software (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Property, Plant and Equipment [Line Items] |  |
Total cost | $ 932 | $ 882
Less: accumulated amortization - capitalized software | (537) | (482)
Less: accumulated depreciation and amortization - property, equipment, building, and improvements | (192) | (213)
Total accumulated depreciation and amortization | (729) | (695)
ROU assets - finance leases | 67 | 72
Property, equipment, and capitalized software, net | 270 | 259
Capitalized software |  |
Property, Plant and Equipment [Line Items] |  |
Total cost | 687 | 615
Property and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total cost | 199 | 221
Building and improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total cost | 41 | 41
Land |  |
Property, Plant and Equipment [Line Items] |  |
Total cost | $ 5 | $ 5

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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-1 + Details
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