9. Goodwill


($ in millions)	Beverage Packaging, North & Central America		Beverage Packaging, South America		Beverage Packaging, Europe		Food & Aerosol Packaging		Aerospace		Other		Total

Balance at December 31, 2016	$	1,614	$	970	$	1,632	$	599	$	40	$	240	$	5,095
Opening balance sheet adjustments		(337)		329		(276)		—		—		(68)		(352)
Business dispositions		—		—		—		(9)		—		—		(9)
Effects of currency exchange rates		—		—		150		17		—		7		174
Balance at September 30, 2017	$	1,277	$	1,299	$	1,506	$	607	$	40	$	179	$	4,908

During the second quarter of 2017, the company finalized the allocation of the purchase price for the Rexam acquisition. The decrease related to goodwill is a result of changes in the fair values and useful lives of fixed assets for the finalization of the valuation of the Rexam acquisition. The company’s annual goodwill impairment test completed in the fourth quarter of 2016 indicated the fair value of the beverage packaging, Asia (Beverage Asia), reporting unit exceeded its carrying amount by approximately 23 percent. The current supply of metal beverage packaging exceeds demand in China, resulting in pricing pressure and negative impacts on the profitability of our Beverage Asia reporting unit. If it becomes an expectation that this oversupply situation will continue for an extended period of time, the company may be required to record a noncash impairment charge for some or all of the goodwill associated with the Beverage Asia reporting unit, the total balance of which was $78 million at September 30, 2017.