Intangible Assets ,net

6 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets

Intangible Assets, net

10.    Intangible Assets, Net

	June 30,		December 31,
($ in millions)	2017		2016
Acquired Rexam intangibles (net of accumulated amortization of $160 million at June 30, 2017, and $62 million at December 31, 2016)	$	2,340	$	1,766
Capitalized software (net of accumulated amortization of $112 million at June 30, 2017, and $87 million at December 31, 2016)		86		79
Other intangibles (net of accumulated amortization of $155 million at June 30, 2017, and $143 million at December 31, 2016)		86		89
	$	2,512	$	1,934

Total amortization expense of intangible assets amounted to $76 million and $117 million for the three and six months ended June 30, 2017, respectively, and $10 million and $20 million for the comparable periods in 2016, respectively. During the three months ended June 30, 2017, cumulative catch-up amortization recorded as a result of the change in the value of intangible assets associated with the finalization of the valuation for the Rexam acquisition was $23 million, of which $8 million related to the three months ended March 31, 2017, and $15 million related to the six months ended December 31, 2016.