Intangible Assets

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets consisted of:



	As of September 30, 2019						As of December 31, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortized Intangible Assets
License agreements	$	229	$	104	$	125	$	305	$	168	$	137
Customer relationships	250		157		93		251		141		110
Other	49		23		26		52		21		31
Total	$	528	$	284	$	244	$	608	$	330	$	278

Unamortized Intangible Assets
Goodwill	$	1,083					$	1,092
Trademarks	$	548					$	547

For the three months ended September 30, 2019 and 2018, amortization expense related to amortizable intangible assets was approximately $13 million and $15 million, respectively. For the nine months ended September 30, 2019 and 2018, amortization expense related to amortizable intangible assets was approximately $44 million and $48 million, respectively. Based on the Company’s amortizable intangible assets at September 30, 2019, the Company expects amortization expense of approximately $13 million for the remainder of 2019, $52 million for 2020, $39 million for 2021, $28 million for 2022, $22 million for 2023 and $19 million for 2024, excluding effects of currency exchange rates.