9. OTHER INTANGIBLE ASSETS

Other intangible assets consist of the following:

	December 31,
(US$ in millions)	2015			2014
Trademarks/brands, finite-lived	$	144		$	192
Licenses		11			11
Port rights		124			60
Other		220			189

		499			452
Less accumulated amortization:
Trademarks/brands(1)		(53	)		(70	)
Licenses		(6	)		(5	)
Port rights		(16	)		(16	)
Other		(98	)		(105	)

		(173	)		(196	)

Intangible assets, net of accumulated amortization	$	326		$	256

(1)Bunge's Brazilian subsidiary's tax deductible goodwill in the Agribusiness segment is in excess of its book goodwill. For financial reporting purposes, for other intangible assets acquired prior to 2009, before recognizing any income tax benefit of tax deductible goodwill in excess of its book goodwill in the consolidated statements of income and after the related book goodwill has been reduced to zero, any such remaining tax deductible goodwill in excess of its book goodwill is used to reduce other intangible assets to zero.

In 2015, Bunge acquired $73 million of port rights and $55 million other intangible assets including $36 million of customer lists. Bunge allocated $111 million to the Milling segment, $15 million to the Edible Oils segment, and $2 million to the Agribusiness segment. Finite lives of these intangibles range from 10 to 27 years. In 2014, Bunge acquired $2 million of patents for developed technology. The amount was allocated to the Agribusiness segment. Finite lives of these patents are for 10 years.

Aggregate amortization expense was $27 million, $32 million and $44 million for the years ended December 31, 2015, 2014 and 2013, respectively. The estimated future aggregate amortization expense is $30 million for 2016 and approximately $30 million annually for 2017 through 2020.