Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Changes in Allowances for Uncollectible Accounts

The changes in the allowance for doubtful accounts for the years ended 2017, 2016 and 2015 were as follows:

In millions	2017			2016			2015
Beginning balance	$	43		$	42		$	43
Provision charged to expense	3			7			7
Write-offs, net of recoveries	(6		)	(6		)	(5		)
Acquisitions and divestitures	—			1			—
Foreign currency translation	3			(1		)	(3		)
Ending balance	$	43		$	43		$	42

Schedule of Inventory

The major classes of inventory at December 31, 2017 and 2016 were as follows:

In millions	2017			2016
Raw material	$	465		$	407
Work-in-process	141			126
Finished goods	703			629
LIFO reserve	(89		)	(86		)
Total inventories	$	1,220		$	1,076

Net Plant and Equipment

The ranges of useful lives used to depreciate plant and equipment are as follows:

Buildings and improvements	5—50 years
Machinery and equipment	3—12 years
Equipment leased to others	Term of lease

Net plant and equipment consisted of the following at December 31, 2017 and 2016:

In millions	2017			2016
Land	$	203		$	186
Buildings and improvements	1,370			1,297
Machinery and equipment	3,301			3,036
Equipment leased to others	164			160
Construction in progress	123			104
Gross plant and equipment	5,161			4,783
Accumulated depreciation	(3,383		)	(3,131		)
Net plant and equipment	$	1,778		$	1,652

Changes in Accrued Warranties

The changes in accrued warranties for the years ended December 31, 2017, 2016 and 2015 were as follows:

In millions	2017			2016			2015
Beginning balance	$	45		$	46		$	49
Charges	(45		)	(41		)	(37		)
Provision charged to expense	43			42			36
Acquisitions and divestitures	—			1			—
Foreign currency translation	2			(3		)	(2		)
Ending balance	$	45		$	45		$	46