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Revenue Recognition - Contract Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Acquisition Costs |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Beginning Balance | $ 57 | $ 58 | $ 58 | $ 61
Cost incurred | 9 | 13 | 19 | 22
Amortization | (10) | (12) | (21) | (24)
Ending Balances | 56 | 59 | 56 | 59
Fulfillment Costs |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Beginning Balance | 47 | 46 | 46 | 46
Cost incurred | 9 | 9 | 19 | 19
Amortization | (9) | (10) | (18) | (20)
Ending Balances | $ 47 | $ 45 | $ 47 | $ 45

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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