GOODWILL AND OTHER INTANGIBLE ASSETS
 6 Months Ended
Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND OTHER INTANGIBLE ASSETS
GOODWILL AND OTHER INTANGIBLE ASSETS
The following table summarizes the changes in the carrying amount of goodwill by segment for the six months ended April 30, 2019:
(in millions)
Rigid
Industrial
Packaging
& Services
 
Paper
Packaging
& Services
 
Total
Balance at October 31, 2018
$
716.5

 
$
59.5

 
$
776.0

Goodwill acquired
—

 
752.5

 
752.5

Currency translation
(5.9
)
 
—

 
(5.9
)
Balance at April 30, 2019
$
710.6

 
$
812.0

 
$
1,522.6


The Caraustar Acquisition added $752.5 million of goodwill to the Paper Packaging & Services segment. See Note 3 to the interim condensed consolidated financial statements for additional disclosure of goodwill added by Caraustar Acquisition.
The following table summarizes the carrying amount of net other intangible assets by class as of April 30, 2019 and October 31, 2018:
(in millions)
Gross
Intangible
Assets
 
Accumulated
Amortization
 
Net
Intangible
Assets
April 30, 2019:
 
 
 
 
 
Indefinite lived:
 
 
 
 
 
Trademarks and patents
$
13.2

 
$
—

 
$
13.2

Definite lived:
 
 
 
 
 
Customer relationships
861.0

 
120.6

 
740.4

Trademarks, patents and trade names
25.8

 
6.4

 
19.4

Non-compete agreements
0.9

 
0.1

 
0.8

Other
22.0

 
17.0

 
5.0

Total
$
922.9

 
$
144.1

 
$
778.8


(in millions)
Gross
Intangible
Assets
 
Accumulated
Amortization
 
Net
Intangible
Assets
October 31, 2018:
 
 
 
 
 
Indefinite lived:
 
 
 
 
 
Trademarks and patents
$
13.3

 
$
—

 
$
13.3

Definite lived:
 
 
 
 
 
Customer relationships
162.2

 
105.8

 
56.4

Trademarks and patents
10.9

 
5.1

 
5.8

Other
21.2

 
16.1

 
5.1

Total
$
207.6

 
$
127.0

 
$
80.6


Amortization expense for the three months ended April 30, 2019 and 2018 was $14.7 million and $3.9 million, respectively. Amortization expense for six months ended April 30, 2019 and 2018 was $18.4 million and $7.7 million, respectively. Amortization expense for the next five years is expected to be $52.5 million in 2019, $66.5 million in 2020, $64.1 million in 2021, $56.8 million in 2022 and $54.1 million in 2023.
The Caraustar Acquisition added $717.1 million of intangibles to the Paper Packaging & Services segment. See Note 3 to the interim condensed consolidated financial statements for additional disclosure of intangibles added by the Caraustar Acquisition.
Definite lived intangible assets for the periods presented are subject to amortization and are being amortized using the straight-line method over periods that are contractually, legally determined, or over the period a market participant would benefit from the asset.