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Supplemental Financial Information (Detail) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Inventories |  |
Finished goods | $ 7 | $ 17
Service parts | 9 | 9
Total inventories | 16 | 26
Deferred revenue |  |
Current deferred revenue | 580 | 552
Long-term deferred revenue | 19 | 27
Total deferred revenue | $ 599 | $ 579

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