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Revenue Recognition (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Effect of LIFO Inventory Liquidation on Income | $ 5.0 |  |
Contract assets | 55.6 | $ 54.9 | $ 0.0
Inventories | 167.2 | 215.1 | 207.9
Total current assets | 671.5 | 656.6 | 656.6
Deferred tax assets, net | 68.7 | 35.9 | 72.0
Total assets | 1,396.8 | 1,419.3 | 1,385.2
Other accrued liabilities | 42.0 | 44.0 | 40.5
Total current liabilities | 174.6 | 205.5 | 173.1
Total liabilities | 640.4 | 678.9 | 638.9
Retained earnings | 95.6 | 150.2 | 85.5
Total stockholders' equity | 756.4 | 740.4 | 746.3
Total liabilities and stockholders' equity | 1,396.8 | 1,419.3 | 1,385.2
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Contract assets |  | 0.0 | 0.0
Inventories |  | 247.5 | 207.9
Total current assets |  | 634.1 | 656.6
Deferred tax assets, net |  | 39.2 | 72.0
Total assets |  | 1,400.1 | 1,385.2
Other accrued liabilities |  | 40.3 | 40.5
Total current liabilities |  | 201.8 | 173.1
Total liabilities |  | 675.2 | 638.9
Retained earnings |  | 134.7 | 85.5
Total stockholders' equity |  | 724.9 | 746.3
Total liabilities and stockholders' equity |  | 1,400.1 | $ 1,385.2
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Contract assets | 55.6 | (54.9) |
Inventories | (40.7) | 32.4 |
Total current assets | 14.9 | (22.5) |
Deferred tax assets, net | (3.3) | 3.3 |
Total assets | 11.6 | (19.2) |
Other accrued liabilities | 1.5 | (3.7) |
Total current liabilities | 1.5 | (3.7) |
Total liabilities | 1.5 | (3.7) |
Retained earnings | 10.1 | (15.5) |
Total stockholders' equity | 10.1 | (15.5) |
Total liabilities and stockholders' equity | $ 11.6 | (19.2) |
Imperial Machine and Tool Co. (''IMT'') [Member] |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Acquisition-related costs |  | $ 0.6 |

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