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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 6 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Class of Stock [Line Items] |  |
Payments for Repurchase of Common Stock | $ 600 | $ 150
Treasury Shares |  |
Class of Stock [Line Items] |  |
Treasury shares acquired (using cost method), shares | 11.5 | 2.2
Treasury shares acquired, average price per share (in usd per share) | $ 52.32 | $ 67.92

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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