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Consolidated Statement of Shareholders' Equity - 9 months ended Sep. 30, 2017 - USD ($) $ in Millions | Total | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member] | Common Stock [Member]
--- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2016 | $ 1,893.0 | $ 625.9 | $ (28.2) | $ 1,295.3
Comprehensive Income [Abstract] |  |  |  |
Net Income | 130.8 | 130.8 |  |
Other Comprehensive Income – Net of Tax [Abstract] |  |  |  |
Currency Translation Adjustments | (0.1) |  | (0.1) |
Unrealized Gain on Securities | 0.8 |  | 0.8 |
Defined Benefit Pension and Other Postretirement Plans | 0.6 |  | 0.6 |
Total Comprehensive Income | 132.1 |  |  |
Common Stock Issued | 99.0 |  |  | 99.0
Dividends Declared | (81.4) | (81.4) |  |
Ending Balance at Sep. 30, 2017 | $ 2,042.7 | $ 675.3 | $ (26.9) | $ 1,394.3

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