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Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2018
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, 2018 and 2017 consisted of the following (in millions):
| Derivative Assets |  | Derivative Liabilities
| 2018 |  | 2017 |  | 2018 |  | 2017
Derivatives Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts - current(1) | $ | .2 |  |  | $ | 5.9 |  |  | $ | 8.3 |  |  | $ | .2 |
Foreign currency forward contracts - non-current(2) | — |  |  | .5 |  |  | .4 |  |  | .1 |
| .2 |  |  | 6.4 |  |  | 8.7 |  |  | .3 |
Derivatives not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts - current(1) | .4 |  |  | .9 |  |  | 2.6 |  |  | .2 |
Total | $ | .6 |  |  | $ | 7.3 |  |  | $ | 11.3 |  |  | $ | .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 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, 2018 were as follows (in millions):
| Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivatives (Effective Portion) |  | (Gain) 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)
| 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
Interest rate lock contracts(3) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | .2 |  |  | $ | .2 |  |  | $ | .2 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Foreign currency forward contracts(4) | (9.7 | ) |  | 8.5 |  |  | (5.4 | ) |  | (1.2 | ) |  | .2 |  |  | 12.2 |  |  | (1.9 | ) |  | (.7 | ) |  | 1.9 |
Total | $ | (9.7 | ) |  | $ | 8.5 |  |  | $ | (5.4 | ) |  | $ | (1.0 | ) |  | $ | .4 |  |  | $ | 12.4 |  |  | $ | (1.9 | ) |  | $ | (.7 | ) |  | $ | 1.9 |
(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 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 were included in interest expense, net, in our consolidated statements of operations.
(4) | During the year ended December 31, 2018, $400,000 of gains were reclassified from AOCI into contract drilling expense and $800,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations. 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 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, 2018, the estimated amount of net losses associated with derivatives, net of tax, that will be reclassified to earnings during the next 12 months was as follows (in millions):
Net unrealized losses to be reclassified to contract drilling expense |  | $ | (5.2 | )
Net realized gains to be reclassified to depreciation expense |  | .8 |
Net realized losses to be reclassified to interest expense |  | (.2 | )
Net losses to be reclassified to earnings |  | $ | (4.6 | )

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- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41641-113959 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959 + Details
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