Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

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, 2021 and 2020 were as follows:

	December 31, 2021						December 31, 2020
	Carrying Amount		Accumulated Amortization		Net		Carrying Amount		Accumulated Amortization		Net
Patents, trademarks and technology	$	27	$	19	$	8	$	27	$	11	$	16
Other intangibles	14		11		3		14		13		1
Total	$	41	$	30	$	11	$	41	$	24	$	17

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
2022	$	9
2023	2
2024	—
2025	—
2026	—