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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions | Total | Common Stock and Additional Paid-in-Capital | Common Stock Held in Treasury | Accumulated Other Comprehensive Loss | Retained Earnings
--- | --- | --- | --- | --- | ---
Balance, common stock shares issued (in shares) at Mar. 31, 2019 |  | 253,200,000 |  |  |
Beginning balance at Mar. 31, 2019 | $ 5,287.5 | $ 2,679.8 | $ (582.2) | $ (20.7) | $ 3,210.6
Balance, common stock held in treasury (in shares) at Mar. 31, 2019 |  |  | 15,600,000 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 50.7 |  |  |  | 50.7
Other comprehensive income (loss) | (0.3) |  |  | (0.3) |
Proceeds from sales of common stock through employee equity incentive plans (shares) |  | 500,000 |  |  |
Proceeds from sales of common stock through employee equity incentive plans | 7.3 | $ 7.3 |  |  |
Restricted stock unit and stock appreciation right withholdings (shares) |  | (100,000) |  |  |
Restricted stock unit and stock appreciation right withholdings | (11.4) | $ (11.4) |  |  |
Treasury stock used for new issuances (shares) |  | (400,000) | (400,000) |  |
Treasury stock used for new issuances | 0.0 | $ (13.8) | $ 13.8 |  |
Share-based compensation | 41.6 | $ 41.6 |  |  |
Cash dividend | (87.1) |  |  |  | (87.1)
Balance, common stock shares issued (in shares) at Jun. 30, 2019 |  | 253,200,000 |  |  |
Ending balance at Jun. 30, 2019 | $ 5,288.3 | $ 2,703.5 | $ (568.4) | (22.3) | 3,175.5
Balance, common stock held in treasury (in shares) at Jun. 30, 2019 |  |  | 15,200,000 |  |
Balance, common stock shares issued (in shares) at Mar. 31, 2020 | 258,391,231 | 258,400,000 |  |  |
Beginning balance at Mar. 31, 2020 | $ 5,585.5 | $ 2,675.3 | $ (500.6) | (21.6) | 3,432.4
Balance, common stock held in treasury (in shares) at Mar. 31, 2020 | 13,065,588 |  | 13,100,000 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | $ 123.6 |  |  |  | 123.6
Other comprehensive income (loss) | 0.5 |  |  | 0.5 |
Proceeds from sales of common stock through employee equity incentive plans (shares) |  | 600,000 |  |  |
Proceeds from sales of common stock through employee equity incentive plans | 11.0 | $ 11.0 |  |  |
Restricted stock unit and stock appreciation right withholdings (shares) |  | (100,000) |  |  |
Restricted stock unit and stock appreciation right withholdings | (11.0) | $ (11.0) |  |  |
Treasury stock used for new issuances (shares) |  | (500,000) | (500,000) |  |
Treasury stock used for new issuances | 0.0 | $ (14.8) | $ 14.8 |  |
Shares issued to settle convertible debt (in shares) |  | 6,600,000 |  |  |
Shares issued to settle convertible debt | 651.5 | $ 651.5 |  |  |
Settlement of convertible debt | (810.7) | (810.7) |  |  |
Share-based compensation | 41.3 | $ 41.3 |  |  |
Cash dividend | $ (90.4) |  |  |  | (90.4)
Balance, common stock shares issued (in shares) at Jun. 30, 2020 | 265,047,572 | 265,000,000.0 |  |  |
Ending balance at Jun. 30, 2020 | $ 5,501.3 | $ 2,542.6 | $ (485.8) | $ (21.1) | $ 3,465.6
Balance, common stock held in treasury (in shares) at Jun. 30, 2020 | 12,597,526 |  | 12,600,000 |  |

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