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Changes in Accounting Principles and Corrections to Previously Issued Financial Statements - Narrative (Details) - USD ($) $ in Millions | Jul. 01, 2017 | Jun. 30, 2018
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Percentage of LIFO Inventory |  | 91.00%
LIFO to FIFO Adjustment |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cumulative Effect on Retained Earnings, Net of Tax | $ 17.6 |

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