Goodwill and Other Identifiable Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying Amount of Goodwill Attributable to Each Reportable Segment

Goodwill
($ in millions)	Performance Coatings			Industrial Coatings			Total
January 1, 2016		$3,073			$552			$3,625
Acquisitions	6			168			174
Foreign currency translation	(209		)	(18		)	(227		)
December 31, 2016		$2,870			$702			$3,572
Acquisitions	23			89			112
Foreign currency translation	211			47			258
December 31, 2017		$3,104			$838			$3,942

Identifiable Intangible Assets with Finite Lives

Identifiable Intangible Assets
	December 31, 2017							December 31, 2016
($ in millions)	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Indefinite-Lived Identifiable Intangible Assets
Trademarks		$1,158		$—			$1,158		$1,107		$—			$1,107
Definite-Lived Identifiable Intangible Assets
Acquired technology		$613		($489	)		$124		$587		($446	)		$141
Customer-related	1,437		(762		)	675		1,272		(618		)	654
Tradenames	166		(87		)	79		142		(71		)	71
Other	44		(35		)	9		38		(28		)	10
Total Definite Lived Intangible Assets		$2,260		($1,373	)		$887		$2,039		($1,163	)		$876
Total Identifiable Intangible Assets		$3,418		($1,373	)		$2,045		$3,146		($1,163	)		$1,983

The Company’s identifiable intangible assets with definite lives are being amortized over their estimated useful lives. Aggregate amortization expense was $129 million, $121 million and $132 million in 2017, 2016 and 2015, respectively.

($ in millions)	2018	2019	2020	2021	2022
Estimated future amortization expense	$125	$115	$105	$100	$100