Supplemental Financial Information (Tables)

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Financial Information

	As of
In millions	September 30, 2017		December 31, 2016
Inventories
Finished goods	$	33	$	20
Service parts	12		14
Total inventories	$	45	$	34
Deferred revenue
Deferred revenue, current	$	364	$	369
Long-term deferred revenue	17		14
Total deferred revenue	$	381	$	383