CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2020	Mar. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par or stated value (in dollars per shares)	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock issued (in shares)	0	0
Common stock, par or stated value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	200,000,000	200,000,000
Common stock, issued (in shares)	143,900,000	141,900,000
Treasury stock, at cost (in shares)	78,100,000	73,200,000