GOODWILL AND INTANGIBLE ASSETS

The following table reflects goodwill activity for fiscal 2018 and 2017:



in millions
	Beef				Pork			Chicken			Prepared Foods				Other^(a)				Unallocated				Consolidated
Balance at October 1, 2016
Goodwill	$	1,236			$	423		$	1,565		$	4,005			$	57			$	—			$	7,286
Accumulated impairment losses	(560		)		—			—			—				(57		)		—				(617		)
	$	676			$	423		$	1,565		$	4,005			$	—			$	—			$	6,669

Fiscal 2017 Activity:
Acquisition	$	—			$	—		$	—		$	—			$	—			$	2,982			$	2,982
Reclass to assets held for sale	—				—			—			(327		)		—				—				(327		)
Balance at September 30, 2017
Goodwill	1,236			—	423		—	1,565		—	3,678			—	57			—	2,982			—	9,941
Accumulated impairment losses	(560		)		—			—			—				(57		)		—				(617		)
	$	676			$	423		$	1,565		$	3,678			$	—			$	2,982			$	9,324

Fiscal 2018 Activity:
Acquisition	$	—			$	—		$	365		$	82			$	—			$	—			$	447
Measurement period adjustments	—				—			—			—				—				(2		)		(2		)
Allocation of acquired goodwill	—				—			568			2,412				—				(2,980		)		—
Reclass to assets held for sale	—				—			—			(30		)		—				—				(30		)
Balance at September 29, 2018
Goodwill	1,236			—	423		—	2,498		—	6,142			—	57			—	—			—	10,356
Accumulated impairment losses	(560		)		—			—			—				(57		)		—				(617		)
	$	676			$	423		$	2,498		$	6,142			$	—			$	—			$	9,739

(a) Other included the goodwill from our foreign chicken operation.

The following table reflects intangible assets by type at September 29, 2018, and September 30, 2017:



in millions
	2018		2017
Amortizable intangible assets:
Brands and trademarks	$	950	$	738
Customer relationships	1,793		1,639
Supply Arrangements	358		—
Patents, intellectual property and other	107		114
Land use rights	9		9
Total gross amortizable intangible assets	$	3,217	$	2,500
Less accumulated amortization	536		335
Total net amortizable intangible assets	$	2,681	$	2,165
Brands and trademarks not subject to amortization	4,078		4,078
Total intangible assets	$	6,759	$	6,243

Amortization expense of $210 million, $107 million and $80 million was recognized during fiscal 2018, 2017 and 2016, respectively. We estimate amortization expense on intangible assets for the next five fiscal years subsequent to September 29, 2018, will be: 2019 - $241 million; 2020 - $240 million; 2021 - $222 million; 2022 - $212 million; 2023 - $201 million.