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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