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Revenue Recognition - Schedule of Capitalized Contract Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Acquisition Costs |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | $ 183 | $ 208 | $ 202 | $ 222
Costs incurred | 31 | 45 | 96 | 129
Amortization | (37) | (49) | (117) | (150)
Change in contract costs held for sale | 0 | 3 | (4) | 6
End of period balance | 177 | 207 | 177 | 207
Acquisition Costs | Held-for-sale, Not Discontinued Operations | EMEA Business |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | 10 |  | 6 |
End of period balance | 10 |  | 10 |
Acquisition Costs | Held-for-sale | Latin American Business and ILEC Business |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance |  | 31 |  | 32
End of period balance |  | 35 |  | 35
Fulfillment Costs |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | 186 | 188 | 192 | 186
Costs incurred | 41 | 38 | 120 | 119
Amortization | (35) | (35) | (106) | (113)
Change in contract costs held for sale | 0 | (2) | (14) | (3)
End of period balance | 192 | 189 | 192 | 189
Fulfillment Costs | Held-for-sale, Not Discontinued Operations | EMEA Business |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | 14 |  | 0 |
End of period balance | $ 14 |  | $ 14 |
Fulfillment Costs | Held-for-sale | Latin American Business and ILEC Business |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance |  | 33 |  | 34
End of period balance |  | $ 28 |  | $ 28

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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 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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