Net Income Per Common Share (Tables)

12 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted net income per common share (in millions, except per share amounts):

	Year Ended March 31,
	2020		2019		2018
Net income	$	570.6	$	355.9	$	255.4
Basic weighted average common shares outstanding	238.9		236.2		232.9
Dilutive effect of stock options and RSUs	3.4		3.8		4.4
Dilutive effect of 2007 Junior Convertible Debt	—		—		1.3
Dilutive effect of 2015 Senior Convertible Debt	13.7		9.9		10.3
Dilutive effect of 2017 Senior Convertible Debt	0.1		—		—
Dilutive effect of 2017 Junior Convertible Debt	0.1		—		—
Diluted weighted average common shares outstanding	256.2		249.9		248.9
Basic net income per common share	$	2.39	$	1.51	$	1.10
Diluted net income per common share	$	2.23	$	1.42	$	1.03

Schedule of Convertible Debt

The following is the weighted average conversion price per share used in calculating the dilutive effect (see Note 7 Debt for details on the convertible debt):

	Year Ended March 31,
	2020		2019		2018
2007 Junior Convertible Debt (1)					$	23.59
2015 Senior Convertible Debt	$	61.80	$	62.86	$	63.94
2017 Senior Convertible Debt	$	96.37	$	98.03	$	99.71
2017 Junior Convertible Debt	$	94.68	$	96.31	$	97.96

⁽¹⁾No longer outstanding as of December 31, 2017.