DEBT (Interest Cost) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest Cost
Interest cost incurred	$ 98.8	$ 148.7	$ 243.4	$ 329.9
Less: Interest capitalized	10.6	11.6	28.9	35.7
Interest expense	$ 88.2	$ 137.1	$ 214.5	$ 294.2

Amount of interest costs capitalized disclosed as an adjusting item to interest costs incurred.

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- Definition

Total interest costs incurred during the period and either capitalized or charged against earnings.

+ References

+ Details

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- References

No definition available.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.9)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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