Quarterly report pursuant to Section 13 or 15(d)

INCOME TAXES - Narrative (Details)

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INCOME TAXES - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Examination [Line Items]          
Federal tax rate     21.00% 31.50%  
Effective Income Tax Rate Reconciliation, Percent 8.50% 17.30%   2.30% 14.00%
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 127.7     $ 127.7  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 109.5     109.5  
Income Tax Examination, Penalties and Interest Accrued 0.9     0.9  
Tax Cuts and Jobs Act of 2017 [Member]          
Income Tax Examination [Line Items]          
Effective Income Tax Rate Reconciliation, Tax Credit, Amount   $ 2.7     $ 2.7
Deferred Tax Asset [Member]          
Income Tax Examination [Line Items]          
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 122.1     122.1  
Other Noncurrent Liabilities [Member]          
Income Tax Examination [Line Items]          
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 5.6     $ 5.6  
German tax authorities [Member]          
Income Tax Examination [Line Items]          
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount         $ 1.6