Goodwill

The changes in the carrying amount of goodwill by operating segment for the six months ended June 30, 2016, are as follows (amounts in millions):



	Activision			Blizzard		King		Other		Total
Balance at December 31, 2015	$	6,905		$	178	$	—	$	12	$	7,095
Additions through acquisition	—			—		2,678		—		2,678
Other	(2		)	—		—		—		(2		)
Balance at June 30, 2016	$	6,903		$	178	$	2,678	$	12	$	9,771

Other includes tax benefits credited to goodwill for tax deductions resulting from the exercise of stock options that were outstanding and vested at the consummation of the Business Combination and included in the purchase price of the Company, to the extent that the tax deduction did not exceed the fair value of those options. Conversely, to the extent that the tax deduction did exceed the fair value of those options, the tax benefit is credited to additional paid‑in capital. Other also includes the impact to goodwill from changes in foreign exchange rates.

The addition to goodwill through acquisition is attributed to the King Acquisition (see Note 14 of the Notes to Condensed Consolidated Financial Statements).