BORROWINGS (Tables)

12 Months Ended

Dec. 31, 2017

Financial Instruments [Abstract]

Disclosure of detailed information about borrowings

(US$ MILLIONS)	Business Services		Construction Services		Industrial Operations		Energy		Total Borrowings
2018	$	269	$	3	$	208	$	342	$	822
2019	409		3		341		1		754
2020	75		3		463		—		541
2021	26		2		87		39		154
2022	337		1		73		—		411
Thereafter	62		—		521		—		583
Total - December 31, 2017	$	1,178	$	12	$	1,693	$	382	$	3,265
Total - December 31, 2016	$	471	$	7	$	528	$	545	$	1,551

The weighted average interest rates of borrowings are as follows:

Weighted Average %	Business Services		Construction Services		Industrial Operations		Energy		Weighted Average
Total - December 31, 2017	4.06	%	2.37	%	9.93	%	6.09	%	7.33	%
Total - December 31, 2016	2.63	%	2.14	%	5.16	%	4.30	%	4.07	%

Borrowings by currency are as follows:

(US$ MILLIONS, except as noted)	December 31, 2017		Local Currency	December 31, 2016		Local Currency
British pounds	46		36	29		23
U.S. dollars	974		974	848		848
Canadian dollars	936		1,090	652		876
Euro	17		14	—		—
Brazilian reais	1,292		4,271	—		—
Other	—		2	22		36
Total	$	3,265		$	1,551