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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES. (Basis of presentation) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017
Accounting Policies [Abstract]
Income tax provision related to the tax law changes	$ 71.1	$ 71.1
Income tax provision related to remeasurement of deferred tax assets and liabilities		18.9
Income tax provision related to mandatory deemed repatriation of foreign sourced net earnings		$ 52.2

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit)

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)

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