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ACCUMULATED OTHER COMPREHENSIVE INCOME
 12 Months Ended
Dec. 31, 2017
Disclosure of analysis of other comprehensive income by item [abstract]  
ACCUMULATED OTHER COMPREHENSIVE INCOME
ACCUMULATED OTHER COMPREHENSIVE INCOME
(a)
Attributable to Limited Partners’
US$ MILLIONS
 
Revaluation
Surplus
 
Foreign
Currency
Translation
 
Net
Investment
Hedges
 
Cash Flow
Hedges
 
Available
for sale
 
Unrealized
Actuarial
Losses
 
Equity
accounted
investments
 
Accumulated
Other
Comprehensive
Income
Balance at December 31, 2015
 
$
1,042

 
$
(889
)
 
$
99

 
$
(140
)
 
$
(9
)
 
$
(13
)
 
$
465

 
$
555

Other comprehensive income (loss)
 
93

 
(5
)
 
117

 
9

 
5

 
(17
)
 
156

 
358

Other items (note 26)
 
(178
)
 
3

 
(1
)
 
1

 
—

 
—

 
(2
)
 
(177
)
Balance at December 31, 2016
 
$
957

 
$
(891
)
 
$
215

 
$
(130
)
 
$
(4
)
 
$
(30
)
 
$
619

 
$
736

Other comprehensive income (loss)
 
19

 
56

 
(187
)
 
104

 
4

 
3

 
129

 
128

Balance at December 31, 2017
 
$
976

 
$
(835
)
 
$
28

 
$
(26
)
 
$
—

 
$
(27
)
 
$
748

 
$
864


(b)
Attributable to General Partner
US$ MILLIONS
 
Revaluation
Surplus
 
Foreign
Currency
Translation
 
Net
Investment
Hedges
 
Cash Flow
Hedges
 
Available
for sale
 
Unrealized
Actuarial
Losses
 
Equity
accounted
investments
 
Accumulated
Other
Comprehensive
Income
Balance at December 31, 2015
 
$
7

 
$
(5
)
 
$
1

 
$
(1
)
 
$
—

 
$
—

 
$
2

 
$
4

Other comprehensive income (loss)
 
1

 
—

 
2

 
—

 
—

 
—

 
1

 
4

Other items (note 26)
 
(1
)
 
—

 
—

 
—

 
—

 
—

 
—

 
(1
)
Balance at December 31, 2016
 
$
7

 
$
(5
)
 
$
3

 
$
(1
)
 
$
—

 
$
—

 
$
3

 
$
7

Other comprehensive income (loss)
 
—

 
(1
)
 
(2
)
 
1

 
—

 
—

 
1

 
(1
)
Balance at December 31, 2017
 
$
7

 
$
(6
)
 
$
1

 
$
—

 
$
—

 
$
—

 
$
4

 
$
6


(c)
Attributable to Non-controlling interest—Redeemable Partnership Units held by Brookfield
US$ MILLIONS
 
Revaluation
Surplus
 
Foreign
Currency
Translation
 
Net
Investment
Hedges
 
Cash Flow
Hedges
 
Available
for sale
 
Unrealized
Actuarial
Losses
 
Equity
accounted
investments
 
Accumulated
Other
Comprehensive
Income
Balance at December 31, 2015
 
$
447

 
$
(358
)
 
$
38

 
$
(61
)
 
$
(4
)
 
$
(2
)
 
$
194

 
$
254

Other comprehensive income (loss)
 
38

 
(4
)
 
49

 
4

 
2

 
(7
)
 
65

 
147

Other items (note 26)
 
(68
)
 
(3
)
 
1

 
(1
)
 
(1
)
 
—

 
2

 
(70
)
Balance at December 31, 2016
 
$
417

 
$
(365
)
 
$
88

 
$
(58
)
 
$
(3
)
 
$
(9
)
 
$
261

 
$
331

Other comprehensive income (loss)
 
8

 
26

 
(77
)
 
44

 
1

 
1

 
53

 
56

Balance at December 31, 2017
 
$
425

 
$
(339
)
 
$
11

 
$
(14
)
 
$
(2
)
 
$
(8
)
 
$
314

 
$
387