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Discontinued Operations (Tables)
 12 Months Ended
Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]  
Summary Of Rig Sales and Income From Discontinued Operations
Rig
 
Date of Sale
 
Segment(1)
 
Net Proceeds
 
Net Book Value(2)
 
Pre-tax(Loss)/Gain
ENSCO DS-2
 
May 2016
 
Floaters
 
$
5.0

 
$
4.0

 
$
1.0

ENSCO 58
 
April 2016
 
Jackups
 
.7

 
.3

 
.4

ENSCO 6000
 
April 2016
 
Floaters
 
.6

700,000

.8

 
(.2
)
ENSCO 5001
 
December 2015
 
Floaters
 
2.4

 
2.5

 
(.1
)
ENSCO 5002
 
June 2015
 
Floaters
 
1.6

 
—

 
1.6

ENSCO 5000
 
December 2014
 
Floaters
 
1.3

 
.5

 
.8

ENSCO 93(3)
 
September 2014
 
Jackups
 
51.7

 
52.9

 
(1.2
)
ENSCO 85
 
April 2014
 
Jackups
 
64.4

 
54.1

 
10.3

ENSCO 69 & Pride Wisconsin (4)
 
January 2014
 
Jackups
 
32.2

 
8.6

 
23.6

 
 
 
 
 
 
$
159.9

 
$
123.7

 
$
36.2


(1) The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2016 and were previously included within the specified operating segment.

(2) Includes the rig's net book value as well as inventory and other assets on the date of the sale.

(3) In September 2014, we sold ENSCO 93, a jackup contracted to Pemex. In connection with this sale, we executed a charter agreement with the purchaser to continue operating the rig for the remainder of the Pemex contract, which ended in July 2015, less than one year from the date of sale. Our management services following the sale did not constitute significant ongoing involvement and therefore, the $1.2 million loss on sale was included in loss from discontinued operations, net, in our consolidated statement of operations for the year ended December 31, 2014.
The following table summarizes income (loss) from discontinued operations for each of the years in the three-year period ended December 31, 2016 (in millions):
 
 
2016
 
2015
 
2014
Revenues
 
$
—

 
$
19.5

 
$
325.0

Operating expenses
 
3.1

 
39.5

 
372.0

Operating loss
 
(3.1
)
 
(20.0
)
 
(47.0
)
Income tax (benefit) expense
 
(10.1
)
 
(7.7
)
 
30.7

Loss on impairment, net
 
—

 
(120.6
)
 
(1,158.8
)
Gain on disposal of discontinued operations, net
 
1.1

 
4.3

 
37.3

Income (loss) from discontinued operations
 
$
8.1

 
$
(128.6
)
 
$
(1,199.2
)