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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)
 12 Months Ended
Dec. 31, 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
 
Africa
 
Europe
 
Latin America
 
Balance as of December 31, 2017
 
$
3,379.2

 
$
1,095.0

 
$
130.6

 
$
274.3

 
$
757.3

 
$
2.0

 
$
5,638.4

Additions and adjustments (1)
 
3.3

 
44.5

 
—

 
—

 
0.4

 
—

 
48.2

Effect of foreign currency translation
 
—

 
(94.0
)
 
(11.3
)
 
(12.3
)
 
(67.1
)
 
—

 
(184.7
)
Balance as of December 31, 2018
 
$
3,382.5

 
$
1,045.5

 
$
119.3

 
$
262.0

 
$
690.6

 
$
2.0

 
$
5,501.9

Additions and adjustments (2)
 
32.8

 
—

 
670.0

 
—

 
—

 
—

 
702.8

Effect of foreign currency translation
 
—

 
(23.7
)
 
0.9

 
(5.8
)
 
2.2

 
—

 
(26.4
)
Balance as of December 31, 2019
 
$
3,415.3

 
$
1,021.8

 
$
790.2

 
$
256.2

 
$
692.8

 
$
2.0

 
$
6,178.3


_______________
(1)
Additions consist of $47.8 million resulting from 2018 acquisitions and $0.4 million from revisions to prior-year acquisitions due to measurement period adjustments.
(2)
Additions consist of $704.3 million resulting from 2019 acquisitions offset by $1.5 million from revisions to prior-year acquisitions due to measurement period adjustments.

Finite Intangible Assets
The Company’s other intangible assets subject to amortization consisted of the following:
 
 
 
As of December 31, 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
 
$
5,150.8

 
$
(1,920.4
)
 
$
3,230.4

 
$
4,780.3

 
$
(1,704.9
)
 
$
3,075.4

Acquired tenant-related intangibles
Up to 20
 
12,674.1

 
(3,674.6
)
 
8,999.5

 
11,156.5

 
(3,147.2
)
 
8,009.3

Acquired licenses and other intangibles
3-20
 
106.7

 
(18.2
)
 
88.5

 
104.1

 
(14.5
)
 
89.6

Total other intangible assets
 
 
$
17,931.6

 
$
(5,613.2
)
 
$
12,318.4

 
$
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 next five years:
Fiscal Year
 
Amount
2020
 
$
885.7

2021
 
860.1

2022
 
856.0

2023
 
852.4

2024
 
838.1