Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2017 and 2016 were as follows:

In millions	Automotive OEM			Test & Measurement and Electronics			Food Equipment			Polymers & Fluids			Welding			Construction Products			Specialty Products			Total
Balance, December 31, 2015	$	277		$	1,355		$	259		$	894		$	261		$	516		$	877		$	4,439
2016 activity:
Acquisitions & divestitures	187			1			—			(2		)	—			(1		)	1			186
Foreign currency translation	(8		)	(20		)	(10		)	(3		)	(1		)	(7		)	(18		)	(67		)
Balance, December 31, 2016	456			1,336			249			889			260			508			860			4,558
2017 activity:
Acquisitions & divestitures	—			—			—			—			—			—			1			1
Foreign currency translation	32			36			20			30			12			22			41			193
Balance, December 31, 2017	$	488		$	1,372		$	269		$	919		$	272		$	530		$	902		$	4,752
Cumulative goodwill impairment charges, December 31, 2017	$	24		$	83		$	60		$	15		$	5		$	7		$	46		$	240

Schedule of Finite-lived Intangible Assets

Intangible assets as of December 31, 2017 and 2016 were as follows:

	2017							2016
In millions	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Amortizable intangible assets:
Customer lists and relationships	$	1,753	$	(1,182	)	$	571	$	1,744	$	(1,060	)	$	684
Trademarks and brands	761		(391		)	370		733		(344		)	389
Patents and proprietary technology	623		(473		)	150		620		(432		)	188
Other	474		(453		)	21		461		(444		)	17
Total amortizable intangible assets	3,611		(2,499		)	1,112		3,558		(2,280		)	1,278
Indefinite-lived intangible assets:
Trademarks and brands	160		—			160		185		—			185
Total intangible assets	$	3,771	$	(2,499	)	$	1,272	$	3,743	$	(2,280	)	$	1,463

Schedule of Indefinite-lived Intangible Assets

Intangible assets as of December 31, 2017 and 2016 were as follows:

	2017							2016
In millions	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Amortizable intangible assets:
Customer lists and relationships	$	1,753	$	(1,182	)	$	571	$	1,744	$	(1,060	)	$	684
Trademarks and brands	761		(391		)	370		733		(344		)	389
Patents and proprietary technology	623		(473		)	150		620		(432		)	188
Other	474		(453		)	21		461		(444		)	17
Total amortizable intangible assets	3,611		(2,499		)	1,112		3,558		(2,280		)	1,278
Indefinite-lived intangible assets:
Trademarks and brands	160		—			160		185		—			185
Total intangible assets	$	3,771	$	(2,499	)	$	1,272	$	3,743	$	(2,280	)	$	1,463

Estimated Amortization Expense of Intangible Assets

The estimated amortization expense of intangible assets for the future years ending December 31 is as follows:

In millions
2018	$	185
2019	163
2020	143
2021	124
2022	112