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Investments (Narrative) (Details) - naviHealth [Member] - USD ($) $ in Millions | 9 Months Ended |
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Mar. 31, 2019 | Aug. 01, 2018
Investment [Line Items] |  |
Equity Method Investments | $ 339 | $ 358
Proceeds from Equity Method Investment, Distribution, Return of Capital | $ 14 |

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