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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Premium on Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | ---
Common Stock, Shares, Outstanding |  | 199.7 |  |  |
Net Income (Loss), Including portion attributable to noncontrolling interest, Number of Shares |  | 0.0 |  |  |
Balance at Dec. 31, 2016 | $ 3,443.8 | $ 2.0 | $ 1,103.8 | $ 2,367.3 | $ (29.3)
Comprehensive income (loss) |  |  |  |  |
Net income | 619.0 | $ 0.0 | 0.0 | 619.0 | 0.0
Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification, Number of Shares |  | 0.0 |  |  |
Other Comprehensive Income (Loss), Net of Tax, Number of Shares |  | 0.0 |  |  |
Other comprehensive income, net of tax | 10.6 | $ 0.0 | 0.0 | 0.0 | 10.6
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | 22.3 | $ 0.0 | 0.0 | 26.8 | (4.5)
Dividends, Common Stock, Cash, Number of Shares |  | 0.0 |  |  |
Dividends declared on common stock | (253.6) | $ 0.0 | 0.0 | (253.6) | 0.0
Stock Issued During Period, Shares, New Issues |  | 0.0 |  |  |
Expense of common stock | (0.1) | $ 0.0 | (0.1) | 0.0 | 0.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Number of Shares |  | 0.0 |  |  |
Stock-based compensation | 9.1 | $ 0.0 | 9.1 | 0.0 | 0.0
Balance at Dec. 31, 2017 | $ 3,851.1 | $ 2.0 | 1,112.8 | 2,759.5 | (23.2)
Comprehensive income (loss) |  |  |  |  |
DIVIDENDS DECLARED PER COMMON SHARE | $ 1.2700 |  |  |  |
Common Stock, Shares, Outstanding |  | 199.7 |  |  |
Net Income (Loss), Including portion attributable to noncontrolling interest, Number of Shares |  | 0.0 |  |  |
Net income | $ 425.5 | $ 0.0 | 0.0 | 425.5 | 0.0
Other Comprehensive Income (Loss), Net of Tax, Number of Shares |  | 0.0 |  |  |
Other comprehensive income, net of tax | (5.7) | $ 0.0 | 0.0 | 0.0 | (5.7)
Dividends, Common Stock, Cash, Number of Shares |  | 0.0 |  |  |
Dividends declared on common stock | (278.7) | $ 0.0 | 0.0 | (278.7) | 0.0
Stock Issued During Period, Shares, New Issues |  | 0.0 |  |  |
Expense of common stock | (0.1) | $ 0.0 | (0.1) | 0.0 | 0.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Number of Shares |  | 0.0 |  |  |
Stock-based compensation | 13.0 | $ 0.0 | 13.0 | 0.0 | 0.0
Balance at Dec. 31, 2018 | $ 4,005.1 | $ 2.0 | 1,125.7 | 2,906.3 | (28.9)
Comprehensive income (loss) |  |  |  |  |
DIVIDENDS DECLARED PER COMMON SHARE | $ 1.3950 |  |  |  |
Common Stock, Shares, Outstanding | 199.7 | 199.7 |  |  |
Net Income (Loss), Including portion attributable to noncontrolling interest, Number of Shares |  | 0.0 |  |  |
Net income | $ 433.6 | $ 0.0 | 0.0 | 433.6 | 0.0
Other Comprehensive Income (Loss), Net of Tax, Number of Shares |  | 0.0 |  |  |
Other comprehensive income, net of tax | 1.0 | $ 0.0 | 0.0 | 0.0 | 1.0
Dividends, Common Stock, Cash, Number of Shares |  | 0.0 |  |  |
Dividends declared on common stock | (303.8) | $ 0.0 | 0.0 | (303.8) | 0.0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Number of Shares |  | 0.4 |  |  |
Stock-based compensation | 3.6 | $ 0.0 | 3.6 | 0.0 | 0.0
Balance at Dec. 31, 2019 | $ 4,139.5 | $ 2.0 | $ 1,129.3 | $ 3,036.1 | $ (27.9)
Comprehensive income (loss) |  |  |  |  |
DIVIDENDS DECLARED PER COMMON SHARE | $ 1.5050 |  |  |  |
Common Stock, Shares, Outstanding | 200.1 | 200.1 |  |  |

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