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Supplemental Financial Information (Detail) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Inventories |  |
Finished goods | $ 21 | $ 32
Service parts | 16 | 17
Total inventories | 37 | 49
Deferred revenue |  |
Deferred revenue, current | 430 | 367
Long-term deferred revenue | 16 | 15
Total deferred revenue | $ 446 | $ 382

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