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Supplemental Financial Information (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Finished goods $ 25 $ 39
Service parts 17 17
Total inventories 42 56
Deferred revenue, current 499 390
Long-term deferred revenue 24 25
Total deferred revenue $ 523 $ 415