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Investments (Summarized Balance Sheet) (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Mar. 31, 2017
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Pop |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Current assets |  | $ 48.2 | $ 45.6
Non-current assets |  | 191.6 | 184.0
Current liabilities |  | 37.2 | 28.5
Non-current liabilities | [1] | 654.9 | 555.7
Redeemable preferred stock(1) | [1] | 638.4 | 547.3
Other Equity Method Investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Current assets |  | 232.7 | 106.1
Non-current assets |  | 130.0 | 27.1
Current liabilities |  | 201.5 | 62.5
Non-current liabilities |  | $ 45.0 | $ 0.4
[1] | Non-current liabilities includes mandatorily redeemable preferred stock units.

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