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INCOME TAXES: (Details 4) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($)
Foreign tax credits |
Other U.S. tax credits | $ 0.0
Foreign |
Foreign tax credits |
Tax credits carryback period | 1 year
Tax credits carryforward period | 10 years
Foreign tax credit carryforward | $ 580.7
Foreign tax credit carryforward net of unrecognized tax benefit | 187.4
2016 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 19.0
2018 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 20.4
2019 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 63.7
2020 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 42.0
2021 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 11.7
2022 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 84.1
2023 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 69.2
2024 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 86.1
Foreign tax credit carryforward net of unrecognized tax benefit | 2.9
2025 | Foreign |
Foreign tax credits |
Foreign tax credit carryforward | 184.5
Foreign tax credit carryforward net of unrecognized tax benefit | $ 184.5

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