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Other assets and liabilities (Tables)
12 Months Ended
Dec. 31, 2019
Subclassifications of assets, liabilities and equities [abstract]  
Schedule of trade receivables
 
2019
2018
 
(US$ millions)
Gross trade receivables
636

592

Less: provisions for expected credit losses
(265
)
(249
)
Trade receivables, net
371

343

Aging of trade receivables
Aging of trade receivables
 
Neither past due nor impaired
Past due (net of impairments)
 
30–90 days
>90 days
Total
 
(US$ millions)
2019:
 
 
 
 
Telecom operators
23

9

8

40

Own customers
177

63

29

270

Others
40

15

5

60

Total
241

88

43

371

2018:
 
 
 
 
Telecom operators
17

9

14

39

Own customers
158

69

19

246

Others
36

17

5

58

Total
210

95

37

343

Inventories
Inventories
 
2019
2018
 
(US$ millions)
Telephone and equipment
18

26

SIM cards
3

4

IRUs
3

3

Other
9

6

Inventory at December 31,
32

39

Provisions and other liabilities
Current
 
2019
2018
 
(US$ millions)
Deferred revenue
77

85

Customer deposits
14

15

Current legal provisions
36

27

Tax payables
74

68

Customer and MFS distributor cash balances
141

147

Withholding tax on payments to third parties
15

17

Other provisions
3

7

Other current liabilities(i)
113

126

Total
474

492

(i) Includes 36 million (2018: 36 million) of tax risk liabilities not related to income tax.
Non-current
 
2019
2018
 
(US$ millions)
Non-current legal provisions
18

8

Long-term portion of asset retirement obligations
96

77

Long-term portion of deferred income on tower sale and leasebacks recognized under IAS 17
68

85

Long-term employment obligations
71

68

Accruals and payables in respect of spectrum and license acquisitions
61

41

Other non-current liabilities
68

71

Total
383

351

Contract assets
Contract costs, net (i)
 
2019
2018
 
(US$ millions)
Net at January 1
4

4

Contract costs capitalized
7

4

Amortisation of contract costs
(6
)
(4
)
Net at December 31
5

4

(i)
Incremental costs of obtaining a contract are expensed when incurred if the amortization period of the asset that Millicom otherwise would have recognized is one year or less.
Contract assets, net
 
2019
2018
 
(US$ millions)
Long-term portion
6

3

Short-term portion
37

35

Less: provisions for expected credit losses
(2
)
(1
)
Total
41

37

Contract liabilities
Contract liabilities
 
2019
2018
 
(US$ millions)
Long-term portion
1

1

Short-term portion
81

86

Total
82

87