Intangible Assets

9 Months Ended

Sep. 30, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

8.   Intangible Assets

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

	(Stated in millions)
	Sept. 30, 2015						Dec. 31, 2014
	Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	BookValue		Amortization		Value		Book Value		Amortization		Value
Technology/Technical Know-How	$	1,776	$	623	$	1,153	$	1,747	$	535	$	1,212
Tradenames		1,640		368		1,272		1,641		319		1,322
Customer Relationships		2,534		623		1,911		2,531		523		2,008
Other		464		276		188		380		268		112
	$	6,414	$	1,890	$	4,524	$	6,299	$	1,645	$	4,654

Amortization expense charged to income was as follows:

(Stated in millions)
	2015		2014
Third Quarter	$	88	$	88
Nine Months	$	267	$	257

Based on the net book value of intangible assets at September 30, 2015, amortization charged to income for the subsequent five years is estimated to be: remainder of 2015—$90 million; 2016—$361 million; 2017—$352 million; 2018—$343 million; 2019—$333 million; and 2020—$313 million.