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Revenue Recognition - Capitalized Contract Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Acquisition Costs |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | $ 215 | $ 279 | $ 222 | $ 289
Costs incurred | 41 | 45 | 84 | 89
Amortization | (49) | (53) | (101) | (107)
Change in contract costs held for sale | 1 | 0 | 3 | 0
End of period balance | 208 | 271 | 208 | 271
Acquisition Costs | Held-for-sale |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | 32 |  | 34 |
End of period balance | 31 |  | 31 |
Fulfillment Costs |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | 187 | 216 | 186 | 216
Costs incurred | 41 | 38 | 81 | 75
Amortization | (39) | (37) | (78) | (74)
Change in contract costs held for sale | (1) | 0 | (1) | 0
End of period balance | 188 | $ 217 | 188 | $ 217
Fulfillment Costs | Held-for-sale |  |  |  |
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning of period balance | 32 |  | 32 |
End of period balance | $ 33 |  | $ 33 |

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- Definition Capitalized Contract Cost, Increase (Decrease) In Held-For-Sale + References No definition available. + Details
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- Definition Capitalized Contract Cost, Incurred + References No definition available. + Details
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- Definition Capitalized Contract Cost [Roll Forward] + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131252-203054 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131252-203054 + Details
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