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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  |  |  |  | 3 Months Ended | 4 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 13, 2023 | Dec. 23, 2022 | Jan. 31, 2022 | Oct. 04, 2021 | Jan. 13, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2021 | Oct. 04, 2021 | Sep. 30, 2021 | Jan. 31, 2022 | Dec. 31, 2022 | Dec. 23, 2022 | Dec. 31, 2021
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  |  |  |  |  |  |  |  | $ 1,250 |  | $ 800
$250 million share repurchase program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  |  | $ 250 |  |  |  |  |  |  |  |
$1 billion share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  |  |  | $ 1,000 |  |  |  |  |  |  |
$300 million share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  |  |  |  | $ 300 |  |  |  |  |  |
$500 million share repurchase program [Domain] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  |  |  |  |  |  | $ 500 |  |  |  |
Treasury Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares |  |  |  |  |  |  |  |  |  |  |  | $ 1,300 |  | $ 800
Treasury Stock, Shares, Acquired |  |  |  |  |  | (4.0) |  | (7.0) |  |  |  | (16.0) |  | (15.0)
Treasury Shares | $250 million share repurchase program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  |  |  |  | (2.6) |  |  |  |  |  |  |  |
Treasury shares acquired, average price per share (in usd per share) |  |  |  |  |  | $ 76.58 |  |  |  |  |  |  |  |
Treasury Shares | $1 billion share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  | (1.6) |  |  |  |  | (12.0) |  |  |  |  |  |  |
Treasury shares acquired, average price per share (in usd per share) |  |  |  |  |  |  | $ 66.74 |  |  |  |  |  | $ 73.36 |
Treasury Shares | $300 million share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | (1.3) |  |  |  |  | (4.8) |  |  |  |  |  |
Treasury shares acquired, average price per share (in usd per share) |  |  |  |  |  |  |  | $ 50.30 |  |  | $ 49.39 |  |  |
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 | Subsequent Event | $250 million share repurchase program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired | (0.6) |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares acquired, average price per share (in usd per share) |  |  |  |  | $ 77.50 |  |  |  |  |  |  |  |  |

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