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v3.20.1

Additional Financial Information (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018 | Apr. 01, 2018 | Apr. 01, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |
Beginning balance | $ 2,921.9 | $ 3,156.9 | $ 2,514.4 |  |
Cumulative effect of accounting changes |  |  |  | $ 18.7 | $ 60.8
Other comprehensive income (loss) | (125.7) | (68.0) | 6.3 |  |
Ending balance | 2,660.0 | 2,921.9 | 3,156.9 |  |
Foreign currency translation adjustments |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |
Beginning balance | (18.2) | (12.4) | (19.4) |  |
Cumulative effect of accounting changes |  |  |  | 0.0 |
Other comprehensive income (loss) | (0.6) | (5.8) | 7.0 |  |
Ending balance | (18.8) | (18.2) | (12.4) |  |
Net unrealized gain (loss) on available-for-sale securities |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |
Beginning balance | 0.0 | 2.6 | 3.1 |  |
Cumulative effect of accounting changes |  |  |  | (2.6) |
Other comprehensive income (loss) | 0.0 | 0.0 | (0.5) |  |
Ending balance | 0.0 | 0.0 | 2.6 |  |
Net unrealized gain (loss) on cash flow hedges |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |
Beginning balance | (62.1) | 0.1 | 0.3 |  |
Cumulative effect of accounting changes |  |  |  | 0.0 |
Other comprehensive income (loss) | (125.1) | (62.2) | (0.2) |  |
Ending balance | (187.2) | (62.1) | 0.1 |  |
Accumulated other comprehensive loss |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |
Beginning balance | (80.3) | (9.7) | (16.0) |  |
Cumulative effect of accounting changes |  |  |  | $ (2.6) |
Other comprehensive income (loss) | (125.7) | (68.0) | 6.3 |  |
Ending balance | $ (206.0) | $ (80.3) | $ (9.7) |  |

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