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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Class of Stock [Line Items] |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  | $ 200 | $ 1,000 | $ 200
$500 million share repurchase program [Domain] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  | $ 500 |  |  |
$300 million share repurchase program [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Purchase of treasury shares |  |  | $ 300 |  |  |  |
$200 million share repurchase program |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Purchase of treasury shares |  | $ 200 |  |  |  |  |
Treasury Shares |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  | (4.0) |  |  | (3.7) | (19.0) | (4.0)
Treasury shares acquired, average price per share (in usd per share) |  |  |  |  | $ 54.40 |  |
Treasury Shares | $500 million share repurchase program [Domain] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | (2.0) | (7.8) |  |  |
Treasury shares acquired, average price per share (in usd per share) |  |  | $ 51.10 | $ 51.53 |  |  |
Treasury Shares | $300 million share repurchase program [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  | (1.3) | (4.8) |  |  |  |
Treasury shares acquired, average price per share (in usd per share) |  | $ 49.39 | $ 50.30 |  |  |  |
Treasury Shares | $200 million share repurchase program |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  | (3.0) |  |  |  |  |
Treasury shares acquired, average price per share (in usd per share) |  | $ 54.01 |  |  |  |  |
Treasury Shares | $200 million share repurchase program | Subsequent Event |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired | (0.6) |  |  |  |  |  |
Treasury shares acquired, average price per share (in usd per share) | $ 56.02 |  |  |  |  |  |

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