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Commitments, Contingencies and Other Items (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Summary of the entity's capital lease activity
The tables below summarize our capital lease activity:
 
Years Ended December 31,
 
2018
 
2017
 
2016
 
(Dollars in millions)
Assets acquired through capital leases
$
2

 
19

 
10

Depreciation expense
14

 
9

 
5

Cash payments towards capital leases
12

 
8

 
6

 
As of December 31,
 
2018
 
2017
 
(Dollars in millions)
Assets included in property, plant and equipment
$
50

 
57

Accumulated depreciation
28

 
24

Schedule of future annual minimum payments under capital lease
The future annual minimum payments under capital lease arrangements as of December 31, 2018 were as follows:
 
Future Minimum
Payments
 
(Dollars in millions)
Capital lease obligations:
 
2019
$
10

2020
6

2021
2

2022
1

2023
1

2024 and thereafter
4

Total minimum payments
24

Less: amount representing interest and executory costs
(5
)
Present value of minimum payments
19

Less: current portion
(12
)
Long-term portion
$
7

Schedule of future minimum receipts and future minimum payments under operating leases
At December 31, 2018, our future rental commitments for Right-of-Way agreements and operating leases were as follows:
 
Right-of-Way Agreements
Operating Leases
Total
 
(Dollars in millions)
2019
$
19

$
35

$
54

2020
20

28

48

2021
20

27

47

2022
20

23

43

2023
19

19

38

2024 and thereafter
102

32

134

Total future minimum payments(1)
$
200

$
164

$
364

_______________________________________________________________________________

(1)
Minimum payments have not been reduced by minimum sublease rentals of $22 million due in the future under non-cancelable subleases.