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v3.10.0.1

Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 16, 2018 | Aug. 01, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2017
Subsequent Event [Line Items] |  |  |  |  |  |
Initial Ownership Interest Before Sale |  |  |  |  |  | 98.00%
Payments for Repurchase of Common Stock |  |  | $ 550 | $ 600 | $ 651 |
naviHealth [Member] | Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Initial Ownership Interest Before Sale |  | 98.00% |  |  |  |
Proceeds from Divestiture of Businesses |  | $ 736 |  |  |  |
Partnership Indirect Ownership |  | 100.00% |  |  |  |
Common Shares | Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Payments for Repurchase of Common Stock | $ 600 |  |  |  |  |
Common shares repurchased, amount | 9.5 |  |  |  |  |
Average price per common share (in usd per share) | $ 50.45 |  |  |  |  |

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