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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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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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