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Intangible Assets

6 Months Ended

Jun. 30, 2022

Goodwill And Intangible Assets Disclosure [Abstract]

6. Intangible Assets

The gross book value, accumulated amortization and net book value of intangible assets were as follows:

	(Stated in millions)

	Jun. 30, 2022						Dec. 31, 2021
	Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Book Value		Amortization		Value		Book Value		Amortization		Value
Customer relationships	$	1,691	$	601	$	1,090	$	1,681	$	551	$	1,130
Technology/technical know-how		1,261		609		652		1,264		562		702
Tradenames		766		207		559		766		191		575
Other		1,618		817		801		1,578		774		804
	$	5,336	$	2,234	$	3,102	$	5,289	$	2,078	$	3,211

Amortization expense charged to income was as follows:

(Stated in millions)

	2022		2021
Second Quarter	$	75	$	75
Six Months	$	150	$	151

Based on the net book value of intangible assets at June 30, 2022, amortization expense for the subsequent five years is estimated to be: remaining two quarters of 2022—$149 million; 2023—$289 million; 2024—$278 million; 2025—$261 million; 2026—$253 million; and 2027—$250 million.