Supplemental Financial Information (Tables)

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Financial Information

	As of
In millions	March 31, 2015		December 31, 2014
Inventories
Finished goods	$	25	$	21
Service parts	17		17
Total inventories	$	42	$	38
Deferred revenue
Deferred revenue, current	$	492	$	370
Long-term deferred revenue	16		18
Total deferred revenue	$	508	$	388