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Discontinued Operations (Tables)
 9 Months Ended
Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]  
Discontinued Operations
The following table presents the financial results of the Divested Business (in millions):
 
 
Three months ended September 30
 
Nine months ended September 30

 
2018
 
2017
 
2018
 
2017
Revenue
 
 
 
 
 
 
 
 
Total revenue
 
$
—

 
$
—

 
$
—

 
$
698

Expenses
 
 
 
 
 
 
 
 
Total operating expenses
 
4

 
14

 
7

 
640

Operating income (loss) from discontinued operations
 
(4
)
 
(14
)
 
(7
)
 
58

Other income (expense)
 
—

 
(1
)
 
—

 
10

Income (loss) from discontinued operations before income taxes
 
(4
)
 
(15
)
 
(7
)
 
68

Income tax expense (benefit)
 
(2
)
 
(6
)
 
(3
)
 
14

Net income (loss) from discontinued operations, excluding gain
 
(2
)
 
(9
)
 
(4
)
 
54

Gain on sale of discontinued operations, net of tax
 
—

 
5

 
9

 
803

Net income (loss) from discontinued operations
 
$
(2
)
 
$
(4
)
 
$
5

 
$
857