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Acquisitions and Strategic Investments (Change in Ownership in Rise Interactive) (Details) - Rise Interactive - USD ($) $ in Millions | Jun. 15, 2020 | Jun. 16, 2020
--- | --- | ---
Business Acquisition [Line Items] |  |
Notes payable issued for purchase price | $ 15.9 |
Cash paid for acquisition | $ 1.0 |
Other Owner |  |
Business Acquisition [Line Items] |  |
Ownership interest by noncontrolling interests | 43.00% | 1.00%
Minimum | Quad/Graphics, Inc. |  |
Business Acquisition [Line Items] |  |
Ownership interest | 57.00% |
Maximum | Quad/Graphics, Inc. |  |
Business Acquisition [Line Items] |  |
Ownership interest | 99.00% |
Rise Interactive |  |
Business Acquisition [Line Items] |  |
Stock repurchased and retired during period, value | $ 5.4 |

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