Intangible Assets, Net

Intangible assets consist of the following:



	December 31,
	2017			2016
	(In millions)
Sands Bethlehem gaming license and certificate	$	67		$	67

Marina Bay Sands gaming license	49			46
Trademarks and other	1			1
	50			47
Less — accumulated amortization	(28		)	(11		)
	22			36
Total intangible assets, net	$	89		$	103

In August 2007 and July 2010, the Company was issued a gaming license and certificate from the Pennsylvania Gaming Control Board for its slots and table games operations at Sands Bethlehem, respectively, which were acquired for $50 million and $17 million, respectively. The license and certificate were determined to have indefinite lives and therefore, are not subject to amortization. In April 2016, the Company paid 66 million Singapore dollars ("SGD," approximately $47 million at exchange rates in effect at the time of the transaction) to the Singapore Casino Regulatory Authority (the "CRA") as part of the process to renew its gaming license at Marina Bay Sands. This license is being amortized over its three-year term, which expires in April 2019, and is renewable upon submitting an application, paying the applicable license fee and meeting the requirements as determined by the CRA.

Amortization expense was $16 million, $15 million and $14 million for the years ended December 31, 2017, 2016 and 2015, respectively. The estimated future amortization expense is approximately $16 million for the year ending December 31, 2018, and $5 million thereafter.