FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Other Financial Instruments (Details)	1 Months Ended	12 Months Ended
	Oct. 31, 2015 EUR (€)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 EUR (€)	Mar. 31, 2016 USD ($)	Feb. 28, 2013 USD ($)
4.625% Notes due February 2020
Other financial instruments
Debt instrument interest rate		4.625%	4.625%		4.625%
Debt instrument					$ 500,000,000.0
4.750% Notes due June 2025
Other financial instruments
Debt instrument interest rate		4.75%	4.75%
Level 1 | 4.625% Notes due February 2020
Other financial instruments
Debt instrument interest rate		4.625%	4.625%	4.625%
Carrying Amount
Other financial instruments
Fair Value		$ 2,798,479,000		$ 2,720,589,000
Carrying Amount | Level 1 | Term Loan, including current portion, due in installments through March 2019
Other financial instruments
Fair Value		502,500,000		547,500,000
Carrying Amount | Level 1 | 4.625% Notes due February 2020
Other financial instruments
Fair Value		500,000,000		500,000,000
Carrying Amount | Level 1 | Term Loan, including current portion, due in installments through November 2021
Other financial instruments
Fair Value		700,000,000		577,500,000
Carrying Amount | Level 1 | 5.000% Notes due February 2023
Other financial instruments
Fair Value		500,000,000		500,000,000
Carrying Amount | Level 1 | 4.750% Notes due June 2025
Other financial instruments
Fair Value		595,979,000		595,589,000
Total
Other financial instruments
Fair Value		2,897,511,000		2,753,403,000
Total | Level 1 | Term Loan, including current portion, due in installments through March 2019
Other financial instruments
Fair Value		503,756,000		542,709,000
Total | Level 1 | 4.625% Notes due February 2020
Other financial instruments
Fair Value		526,255,000		524,735,000
Total | Level 1 | Term Loan, including current portion, due in installments through November 2021
Other financial instruments
Fair Value		699,566,000		573,533,000
Total | Level 1 | 5.000% Notes due February 2023
Other financial instruments
Fair Value		534,820,000		507,500,000
Total | Level 1 | 4.750% Notes due June 2025
Other financial instruments
Fair Value		633,114,000		$ 604,926,000
Mirror Controls International
Other financial instruments
Debt instrument	€ 50,000,000	$ 53,680,000.00
Debt instrument term	5 years	5 years
Mirror Controls International | Term Loan Agreement Due January 2022
Other financial instruments
Debt instrument		$ 107,400,000	€ 100,000,000
Mirror Controls International | Unsecured Term Loan Due September 2020
Other financial instruments
Debt instrument		$ 53,000,000	€ 49,400,000