Supplemental Financial Information (Tables)

3 Months Ended

Mar. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Financial Information

	As of
In millions	March 31, 2018		December 31, 2017
Inventories
Finished goods	$	31	$	18
Service parts	12		12
Total inventories	$	43	$	30
Deferred revenue
Deferred revenue, current	$	532	$	414
Long-term deferred revenue	72		85
Total deferred revenue	$	604	$	499