Supplemental Financial Information (Tables)

3 Months Ended

Mar. 31, 2018

Supplemental Financial Information [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

The components of accounts receivable are summarized as follows:

In millions	March 31, 2018			December 31, 2017
Accounts receivable
Trade	$	1,334		$	1,270
Other	43			37
Accounts receivable, gross	1,377			1,307
Less: allowance for doubtful accounts	(39		)	(37		)
Total accounts receivable, net	$	1,338		$	1,270

Schedule of Inventory, Current

The components of inventory are summarized as follows:

In millions	March 31, 2018		December 31, 2017
Inventories
Work in process and raw materials	$	211	$	185
Finished goods	210		190
Service parts	401		405
Total inventories	$	822	$	780