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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)
 9 Months Ended
Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in the carrying value of goodwill

The changes in the carrying value of goodwill for each of the Company’s business segments were as follows:
 
 
Property
 
Services
 
Total
 
 
U.S.
 
Asia
 
EMEA
 
Latin America
 
Balance as of January 1, 2019
 
$
3,382.5

 
$
1,045.5

 
$
381.3

 
$
690.6

 
$
2.0

 
$
5,501.9

Additions and adjustments (1)
 
33.5

 
—

 
—

 
—

 
—

 
33.5

Effect of foreign currency translation
 
—

 
(16.3
)
 
(16.8
)
 
(20.9
)
 
—

 
(54.0
)
Balance as of September 30, 2019
 
$
3,416.0

 
$
1,029.2

 
$
364.5

 
$
669.7

 
$
2.0

 
$
5,481.4

_______________
(1)
Additions consist of $34.3 million resulting from 2019 acquisitions offset by $0.8 million from revisions to prior-year acquisitions due to measurement period adjustments.

Intangible assets subject to amortization
The Company’s other intangible assets subject to amortization consisted of the following:
 
 
 
 
As of September 30, 2019
 
As of December 31, 2018
 
Estimated Useful
Lives (years)
 
Gross
Carrying
Value
 
Accumulated
Amortization
 
Net Book
Value
 
Gross
Carrying
Value
 
Accumulated
Amortization
 
Net Book
Value
Acquired network location intangibles (1)
Up to 20
 
$
4,832.7

 
$
(1,863.2
)
 
$
2,969.5

 
$
4,780.3

 
$
(1,704.9
)
 
$
3,075.4

Acquired tenant-related intangibles
15-20
 
11,359.2

 
(3,517.3
)
 
7,841.9

 
11,156.5

 
(3,147.2
)
 
8,009.3

Acquired licenses and other intangibles
3-20
 
103.9

 
(19.5
)
 
84.4

 
104.1

 
(14.5
)
 
89.6

Total other intangible assets
 
 
$
16,295.8

 
$
(5,400.0
)
 
$
10,895.8

 
$
16,040.9

 
$
(4,866.6
)
 
$
11,174.3

_______________
(1)
Acquired network location intangibles are amortized over the shorter of the term of the corresponding ground lease, taking into consideration lease renewal options and residual value, or up to 20 years, as the Company considers these intangibles to be directly related to the tower assets.
Expected future amortization expenses Based on current exchange rates, the Company expects to record amortization expense as follows over the remaining current year and the five subsequent years:
 
Fiscal Year
 
Amount
Remainder of 2019
 
$
199.0

2020
 
777.8

2021
 
761.7

2022
 
757.7

2023
 
753.8

2024
 
750.8