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Derivative Instruments (Tables)
 12 Months Ended
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule Of Derivatives At Fair Value
Derivatives recorded at fair value on our consolidated balance sheets as of December 31, 2017 and 2016 consisted of the following (in millions):
 
Derivative Assets
 
Derivative Liabilities
 
2017
 
2016
 
2017
 
2016
Derivatives Designated as Hedging Instruments
 

 
 

 
 

 
 

Foreign currency forward contracts - current(1)
$
5.9

 
$
4.1

 
$
.2

 
$
11.4

Foreign currency forward contracts - non-current(2)
.5

 
.2

 
.1

 
.8

 
6.4

 
4.3

 
.3

 
12.2

Derivatives not Designated as Hedging Instruments
 

 
 

 
 

 
 

Foreign currency forward contracts - current(1)
.9

 
.4

 
.2

 
1.3

 
.9

 
.4

 
.2

 
1.3

Total
$
7.3

 
$
4.7

 
$
.5

 
$
13.5


(1) 
Derivative assets and liabilities that have maturity dates equal to or less than 12 months from the respective balance sheet dates were included in other current assets and accrued liabilities and other, respectively, on our consolidated balance sheets. 

(2) 
Derivative assets and liabilities that have maturity dates greater than 12 months from the respective balance sheet dates were included in other assets, net, and other liabilities, respectively, on our consolidated balance sheets.
Gains And Losses On Derivatives Designated As Cash Flow Hedges
Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our consolidated statements of operations and comprehensive income for each of the years in the three-year period ended December 31, 2017 were as follows (in millions):
 
Gain (Loss) Recognized in Other Comprehensive
Income ("OCI")
on Derivatives
  (Effective Portion)  
 
Loss Reclassified from
 AOCI into Income
(Effective Portion)(1)
 
Gain (Loss) Recognized
in Income on
Derivatives (Ineffective
Portion and Amount
Excluded from
Effectiveness Testing)(2)
 
2017
 
2016
 
2015
 
2017
 
2016
 
2015
 
2017
 
2016
 
2015
Interest rate lock contracts(3) 
$
—

 
$
—

 
$
—

 
$
(.2
)
 
$
(.2
)
 
$
(.6
)
 
$
—

 
$
—

 
$
—

Foreign currency forward contracts(4)
8.5

 
(5.4
)
 
(23.6
)
 
(.2
)
 
(12.2
)
 
(21.6
)
 
(.7
)
 
1.9

 
(.1
)
Total
$
8.5

 
$
(5.4
)
 
$
(23.6
)
 
$
(.4
)
 
$
(12.4
)
 
$
(22.2
)
 
$
(.7
)
 
$
1.9

 
$
(.1
)
 
(1)
Changes in the fair value of cash flow hedges are recorded in AOCI.  Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction.

(2) 
Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our consolidated statements of operations.

(3) 
Losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interest expense, net, in our consolidated statements of operations.

(4) 
During the year ended December 31, 2017, $1.1 million of losses were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations. During the year ended December 31, 2016, $13.1 million of losses were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations. During the year ended December 31, 2015, $22.5 million of losses were reclassified from AOCI into contract drilling and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations.
Schedule Of Estimated Amount Of Net Gains Associated With Derivatives
As of December 31, 2017, the estimated amount of net gains associated with derivatives, net of tax, that will be reclassified to earnings during the next 12 months was as follows (in millions):

Net unrealized gains to be reclassified to contract drilling expense
 
$
3.1

Net realized gains to be reclassified to depreciation expense
 
.9

Net realized losses to be reclassified to interest expense
 
(.4
)
Net gains to be reclassified to earnings
 
$
3.6