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Acquisitions - Bemis Fair Value Consideration (Details) - Bemis Acquisition $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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Jun. 30, 2019 USD ($) $ / shares shares
Business Acquisition [Line Items] |
Bemis shares outstanding at June 11, 2019 (in millions) | shares | 91.7
Share exchange ratio | 5.1
Price per share (based on Amcor’s closing share price on June 11, 2019) | $ / shares | $ 11.18
Total equity consideration ($ in millions) | $ | $ 5,229.6

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