Goodwill

Changes in goodwill during the years ended December 31, 2016 and 2015 are summarized as follows (in millions):



	IFS		GFS			Corporate & Other			Total
Balance, December 31, 2014	$	6,627	$	1,990		$	261		$	8,878
Goodwill acquired during 2015	1,049		4,653			301			6,003
Goodwill distributed through sale of non-strategic assets	—		—			(98		)	(98		)
Purchase price and foreign currency adjustments	—		(38		)	—			(38		)
Balance, December 31, 2015	7,676		6,605			464			14,745
Purchase price and foreign currency adjustments	—		(273		)	65			(208		)
Goodwill relating to PS&E included in assets held for sale	—		—			(359		)	(359		)
Balance, December 31, 2016	$	7,676	$	6,332		$	170		$	14,178

In conjunction with the organizational modifications in the first quarter of 2016, we reallocated goodwill associated with the reclassified businesses based on relative fair value as of January 1, 2016. We refreshed our step zero qualitative analysis, identifying no indications of impairment for any of our reporting units. In performing the step zero qualitative analysis for 2016, examining those factors most likely to affect our valuations, we concluded that it remained more likely than not that the fair value of each of our reporting units continued to exceed their carrying amounts. As a result, no reporting units were at risk of impairment as of the September 30, 2016 measurement date (see Note 2 (g)).