Supplemental Financial Information (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accounts receivable
Trade	$ 559	$ 561
Other	7	6
Accounts receivable, gross	566	567
Less: allowance for doubtful accounts	(12)	(19)
Total accounts receivable, net	554	548
Inventories
Finished goods	18	20
Service parts	12	14
Total inventories	30	34
Property and equipment
Land	8	8
Buildings and improvements	82	77
Machinery and other equipment	404	354
Property and equipment, gross	494	439
Less: accumulated depreciation	(332)	(301)
Total property and equipment, net	162	138
Other current liabilities
Sales and value-added taxes	30	28
Pension and other postemployment plan liabilities	2	7
Other	70	53
Total other current liabilities	102	88
Deferred revenue
Deferred revenue, current	414	369
Long-term deferred revenue	85	14
Total deferred revenue	499	383
Other long-term liabilities
Transition tax	133	0
Uncertain tax positions	14	20
Other	2	12
Total other long-term liabilities	$ 149	$ 32