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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 96.3 | $ 189.2 | $ 132.0 | $ 359.7
Available-for-sale securities: |  |  |  |
Unrealized holding losses, net of tax effect | 0.0 | 0.5 | (5.6) | (0.4)
Reclassification of realized transactions, net of tax effect | 0.0 | 0.0 | 5.6 | 0.0
Defined benefit plans: |  |  |  |
Actuarial (losses) gains related to defined benefit pension plans, net of tax benefit (provision) | (0.9) | 0.6 | 3.5 | (3.5)
Reclassification of realized transactions, net of tax effect | 0.2 | 0.2 | 0.5 | 0.4
Change in net foreign currency translation adjustment | (1.1) | 0.0 | (1.4) | 0.0
Other comprehensive (loss) income, net of tax effect | (1.8) | 1.3 | 2.6 | (3.5)
Comprehensive income | $ 94.5 | $ 190.5 | $ 134.6 | $ 356.2

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