CONSOLIDATED STATEMENTS OF CASH FLOWS NONPRINTING $ in Millions	12 Months Ended
	Mar. 31, 2018 USD ($) shares
2007 Junior Subordinated Convertible Notes
Shares issued to settle convertible debt | shares	3,700,000
Extinguishment of debt, amount	$ 143.8
Long-term Debt | 2017 Junior Subordinated Convertible Debt
Notes issued	$ 111.3
Long-term Debt | 2007 Junior Subordinated Convertible Notes
Shares issued to settle convertible debt | shares	3,200,000
Extinguishment of debt, amount	$ 111.3