Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of gross carrying amount and accumulated amortization of intangible assets

Intangible assets are stated at cost (fair value at the time of acquisition) and are amortized using the straight-line method over the estimated useful lives or the life of the related agreement as follows:

Patents, trademarks and technology	5 - 30 years
Other intangibles	5 - 15 years

The cost and accumulated amortization of intangible assets at December 31, 2019 and December 31, 2018 were as follows:

	December 31, 2019						December 31, 2018
	Carrying Amount		Accumulated Amortization		Net		Carrying Amount		Accumulated Amortization		Net
Patents, trademarks and technology	$	27	$	10	$	17	$	18	$	9	$	9
Other intangibles	14		10		4		14		7		7
Total	$	41	$	20	$	21	$	32	$	16	$	16

Schedule of estimated future amortization expense for intangible assets

Our estimated future amortization expense for intangible assets over the next five years is as follows:

Year ending December 31,	Amount
2020	$	4
2021	5
2022	4
2023	4
2024	1