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Revenue Recognition (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Revenues |  |  | $ 393.1 | $ 332.8 | $ 1,196.5 | $ 1,044.4 |
Cost of products sold, excluding depreciation and amortization and other items1 | [1] |  | 323.3 | 256.4 | 983.4 | 808.7 |
Effect of LIFO Inventory Liquidation on Income |  | $ 5.0 |  |  |  |  |
Contract assets |  | 55.6 | 51.0 |  | 51.0 |  | $ 0.0
Inventories |  | 167.2 | 196.2 |  | 196.2 |  | 207.9
Total current assets |  | 671.5 | 673.0 |  | 673.0 |  | 656.6
Deferred tax assets, net |  | 68.7 | 42.2 |  | 42.2 |  | 72.0
Assets |  | 1,396.8 | 1,426.0 |  | 1,426.0 |  | 1,385.2
Other accrued liabilities |  | 42.0 | 37.0 |  | 37.0 |  | 40.5
Total current liabilities |  | 174.6 | 192.5 |  | 192.5 |  | 173.1
Total liabilities |  | 640.4 | 663.5 |  | 663.5 |  | 638.9
Retained earnings |  | 95.6 | 135.6 |  | 135.6 |  | 85.5
Total stockholders' equity |  | 756.4 | 762.5 |  | 762.5 |  | 746.3
Total liabilities and stockholders’ equity |  | 1,396.8 | 1,426.0 |  | 1,426.0 |  | 1,385.2
Operating income |  |  | 34.9 | 41.5 | 106.7 | 113.3 |
Income before income taxes |  |  | 29.9 | 36.0 | 90.0 | 97.4 |
Income tax provision |  |  | (8.2) | (16.1) | (21.9) | (36.8) |
Net income |  |  | $ 21.7 | $ 19.9 | $ 68.1 | $ 60.6 |
Basic earnings per share (in dollars per share) |  |  | $ 1.31 | $ 1.18 | $ 4.09 | $ 3.55 |
Diluted earnings per share (in dollars per share) |  |  | $ 1.29 | $ 1.16 | $ 4.03 | $ 3.49 |
Comprehensive income |  |  | $ 20.9 | $ 21.5 | $ 65.4 | $ 64.6 |
Contract assets |  |  |  |  | 4.6 | 0.0 |
Inventories |  |  |  |  | (25.6) | (10.6) |
Accrued liabilities |  |  |  |  | (1.0) | 0.9 |
Net cash provided by (used in) operating activities | [2] |  |  |  | 112.5 | $ 131.5 |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |  |  |  |  |
Revenues |  |  | 1.6 |  | 4.8 |  |
Cost of products sold, excluding depreciation and amortization and other items1 |  |  | 1.9 |  | 9.5 |  |
Contract assets |  | 55.6 | (51.0) |  | (51.0) |  |
Inventories |  | (40.7) | 31.3 |  | 31.3 |  |
Total current assets |  | 14.9 | (19.7) |  | (19.7) |  |
Deferred tax assets, net |  | (3.3) | 3.3 |  | 3.3 |  |
Assets |  | 11.6 | (16.4) |  | (16.4) |  |
Other accrued liabilities |  | 1.5 | (2.7) |  | (2.7) |  |
Total current liabilities |  | 1.5 | (2.7) |  | (2.7) |  |
Total liabilities |  | 1.5 | (2.7) |  | (2.7) |  |
Retained earnings |  | 10.1 | (13.7) |  | (13.7) |  |
Total stockholders' equity |  | 10.1 | (13.7) |  | (13.7) |  |
Total liabilities and stockholders’ equity |  | $ 11.6 | (16.4) |  | (16.4) |  |
Operating income |  |  | (0.3) |  | (4.7) |  |
Income before income taxes |  |  | (0.3) |  | (4.7) |  |
Income tax provision |  |  | 0.1 |  | 1.1 |  |
Net income |  |  | $ (0.2) |  | $ (3.6) |  |
Basic earnings per share (in dollars per share) |  |  | $ (0.01) |  | $ (0.21) |  |
Diluted earnings per share (in dollars per share) |  |  | $ (0.01) |  | $ (0.21) |  |
Comprehensive income |  |  | $ (0.2) |  | $ (3.6) |  |
Contract assets |  |  |  |  | (4.6) |  |
Inventories |  |  |  |  | 9.4 |  |
Accrued liabilities |  |  |  |  | (1.2) |  |
Net cash provided by (used in) operating activities |  |  |  |  | 0.0 |  |
Calculated under Revenue Guidance in Effect before Topic 606 |  |  |  |  |  |  |
Revenues |  |  | 394.7 |  | 1,201.3 |  |
Cost of products sold, excluding depreciation and amortization and other items1 |  |  | 325.2 |  | 992.9 |  |
Contract assets |  |  | 0.0 |  | 0.0 |  | 0.0
Inventories |  |  | 227.5 |  | 227.5 |  | 207.9
Total current assets |  |  | 653.3 |  | 653.3 |  | 656.6
Deferred tax assets, net |  |  | 45.5 |  | 45.5 |  | 72.0
Assets |  |  | 1,409.6 |  | 1,409.6 |  | 1,385.2
Other accrued liabilities |  |  | 34.3 |  | 34.3 |  | 40.5
Total current liabilities |  |  | 189.8 |  | 189.8 |  | 173.1
Total liabilities |  |  | 660.8 |  | 660.8 |  | 638.9
Retained earnings |  |  | 121.9 |  | 121.9 |  | 85.5
Total stockholders' equity |  |  | 748.8 |  | 748.8 |  | 746.3
Total liabilities and stockholders’ equity |  |  | 1,409.6 |  | 1,409.6 |  | $ 1,385.2
Operating income |  |  | 34.6 |  | 102.0 |  |
Income before income taxes |  |  | 29.6 |  | 85.3 |  |
Income tax provision |  |  | (8.1) |  | (20.8) |  |
Net income |  |  | $ 21.5 |  | $ 64.5 |  |
Basic earnings per share (in dollars per share) |  |  | $ 1.30 |  | $ 3.88 |  |
Diluted earnings per share (in dollars per share) |  |  | $ 1.28 |  | $ 3.82 |  |
Comprehensive income |  |  | $ 20.7 |  | $ 61.8 |  |
Contract assets |  |  |  |  | 0.0 |  |
Inventories |  |  |  |  | (16.2) |  |
Accrued liabilities |  |  |  |  | (2.2) |  |
Net cash provided by (used in) operating activities |  |  |  |  | $ 112.5 |  |
[1] | See Note 5 for discussion of our adoption of ASU 2017-12 (as defined in Note 1) and the related reclassification of amounts previously presented in the Statements of Consolidated Income within Unrealized (gain) loss on derivative instruments and now included within Cost of products sold, excluding depreciation and amortization and other items.
[2] | See Note 9 for adjustments made to arrive at our Consolidated Balance Sheet as of January 1, 2018 upon adopting ASC 606 (as defined in Note 1).

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