7. Other Assets

Other assets (noncurrent) consist of the following at December 31, 2018 and 2017:


	2018		2017
Deferred tax assets	$	191	$	194
Deferred returnable packaging costs		109		119
Repair part inventories		102		106
Capitalized software		79		82
Value added taxes		26		24
Other		95		77
	$	602	$	602

Capitalized software includes costs related to the acquisition and development of internal-use software. These costs are amortized over the estimated useful life of the software. Amortization expense for capitalized software was $12 million, $12 million and $13 million for 2018, 2017, and 2016, respectively. Estimated amortization related to capitalized software through 2023 is as follows: 2019, $14 million; 2020, $12 million; 2021, $12 million; 2022, $11 million; and 2023, $10 million.