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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) Segment | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Number of operating segments | Segment | 1 |  |
Contract with customer, assets | $ 20 | $ 20 |
Reimbursements from customers | 192 | 204 | $ 205
Impairments of goodwill | 0 | 0 | 0
Net transaction losses | $ (30) | $ (25) | $ (29)
Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Other intangible assets, useful lives | 3 years |  |
Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Other intangible assets, useful lives | 25 years |  |

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 + Details
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