BANK BORROWINGS AND LONG TERM DEBT - Debt Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 2,980,624
Debt issuance costs	(16,092)	$ (16,007)
Total	2,964,532	2,952,143
4.625% Notes due February 2020
Debt Instrument [Line Items]
Long-term debt	$ 500,000	$ 500,000
Debt instrument interest rate (as a percent)	4.625%	4.625%
Term Loan, including current portion, due in installments through June 2022
Debt Instrument [Line Items]
Long-term debt	$ 700,000	$ 700,000
Term Loan, including current portion, due in installments through June 2022
Debt Instrument [Line Items]
Long-term debt	502,500	502,500
5.000% Notes due February 2023
Debt Instrument [Line Items]
Long-term debt	$ 500,000	$ 500,000
Debt instrument interest rate (as a percent)	5.00%	5.00%
4.750% Notes due June 2025
Debt Instrument [Line Items]
Long-term debt	$ 596,078	$ 595,979
Debt instrument interest rate (as a percent)	4.75%	4.75%
Other
Debt Instrument [Line Items]
Long-term debt	$ 182,046	$ 169,671

Long-term Debt, Net of Debt Issuance Costs

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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