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Discontinued Operations - Additional Information (Details) - South African Distribution Business and Zambian Operations - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 | Jun. 30, 2016 | Mar. 31, 2016 | Feb. 29, 2016
Discontinued Operations, Disposed of by Sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Stock sold (as a percent) |  |  | 100.00% | 100.00%
Discontinued Operations, Held-for-sale or Disposed of by Sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Amount in escrow from potential acquirer |  |  |  | $ 15.9
Gain (loss) on sale | $ 0.3 | $ 2.5 |  |

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