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SUPPLEMENTAL CASH FLOW INFORMATION
 12 Months Ended
Dec. 31, 2019
Cash Flow Statement [Abstract]  
SUPPLEMENTAL CASH FLOW INFORMATION
SUPPLEMENTAL CASH FLOW INFORMATION
 
 
Year Ended December 31
(US$ MILLIONS)
 
2019
 
2018
 
2017
Interest paid
 
$
1,079

 
$
456

 
$
103

Income taxes paid
 
$
190

 
$
112

 
$
41


Amounts paid and received for interest were reflected as operating cash flows in the consolidated statements of cash flow.
Total cash outflows across the partnership’s lease contracts were $305 million
Details of “Changes in non-cash working capital, net” on the consolidated statements of cash flow are as follows:
 
 
Year Ended December 31
(US$ MILLIONS)
 
2019
 
2018
 
2017
Accounts receivable
 
$
(70
)
 
$
(11
)
 
$
(520
)
Inventory
 
78

 
153

 
(259
)
Prepayments and other
 
(11
)
 
(89
)
 
185

Accounts payable and other
 
119

 
(322
)
 
143

Changes in non-cash working capital, net
 
$
116

 
$
(269
)
 
$
(451
)

The following table presents the change in the balance of liabilities arising from financing activities as at December 31, 2019:
(US$ MILLIONS)
 
2019
 
2018
Balance at beginning of year
 
$
10,866

 
$
3,265

Cash flows
 
11,378

 
4,568

Non-cash changes:
 
 
 
 
Acquisitions / (dispositions) of subsidiaries
 
357

 
3,258

Foreign currency translation
 
(9
)
 
(299
)
Fair value
 
(19
)
 
43

Held for sale (1)
 
(305
)
 
—

Other changes
 
131

 
31

Balance at end of year
 
$
22,399

 
$
10,866


____________________________________
(1) 
Includes liabilities that were reclassified as held for sale and subsequently disposed. See Note 8 and Note 9 for additional information.