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Revenue from Contracts with Customers - Schedule of Contract Assets Rollforward (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Capitalized Cost To Fulfill Customer Contracts |  |  |  |
Change in Capitalized Contract Costs |  |  |  |
Balance at beginning of period | $ 264 | $ 242 | $ 370 | $ 355
Additions | 400 | 357 | 1,166 | 1,074
Amortization | (367) | (321) | (1,235) | (1,156)
Impairment | 0 | 0 | 0 | 0
Foreign currency translation and other | 5 | (5) | 1 | 0
Balance at end of period | 302 | 273 | 302 | 273
Capitalized Cost To Obtain Customer Contracts |  |  |  |
Change in Capitalized Contract Costs |  |  |  |
Balance at beginning of period | 196 | 186 | 195 | 185
Additions | 19 | 14 | 51 | 37
Amortization | (13) | (13) | (40) | (38)
Impairment | 0 | 0 | 0 | 0
Foreign currency translation and other | 0 | (1) | (4) | 2
Balance at end of period | $ 202 | $ 186 | $ 202 | $ 186

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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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