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Commitments And Contingencies (Tables)
 12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Capital Commitments
The following table summarizes the cumulative amount of contractual payments made as of December 31, 2015 for our rigs under construction and estimated timing of our remaining contractual payments (in millions): 
 
 
Cumulative Paid(1)
 
2016
 
2017
 
2018
 
Total(2)
ENSCO DS-10
 
$
236.2

 
$
9.3

 
$
310.5

 
$
—

 
$
556.0

ENSCO 123
 
53.5

 
3.2

 
9.5

 
215.4

 
281.6

ENSCO 140
 
156.8

 
39.9

 
—

 
—

 
196.7

ENSCO 141
 
78.4

 
117.2

 
—

 
—

 
195.6

 
 
$
524.9

 
$
169.6

 
$
320.0

 
$
215.4

 
$
1,229.9



(1)
Cumulative paid represents the aggregate amount of contractual payments made from commencement of the construction agreement through December 31, 2015.

(2)
Total commitments are based on fixed-price shipyard construction contracts, exclusive of costs associated with commissioning, systems integration testing, project management and capitalized interest.