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Consolidated Statements of Equity - USD ($) $ in Millions | Total | Total equity | Total common shareholders' equity | Common stock | Additional paid-in capital | Retained earnings | Accumulated other comprehensive income (loss) | Preferred stock of subsidiary | Noncontrolling interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Equity |  |  |  |  |  |  |  |  |
Balance |  | $ 9,842.7 | $ 9,788.9 | $ 3.2 | $ 4,250.1 | $ 5,538.2 | $ (2.6) | $ 30.4 | $ 23.4
Net income attributed to common shareholders | $ 1,134.0 | 1,134.0 | 1,134.0 | 0.0 | 0.0 | 1,134.0 | 0.0 | 0.0 | 0.0
Net income (loss) attributed to noncontrolling interests | (0.5) | (0.5) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (0.5)
Other comprehensive income (loss) | (1.5) | (1.5) | (1.5) | 0.0 | 0.0 | 0.0 | (1.5) | 0.0 | 0.0
Common stock dividends |  | (744.5) | (744.5) | 0.0 | 0.0 | (744.5) | 0.0 | 0.0 | 0.0
Exercise of stock options |  | 67.0 | 67.0 | 0.0 | 67.0 | 0.0 | 0.0 | 0.0 | 0.0
Purchase of common stock | (140.1) | (140.1) | (140.1) | 0.0 | (140.1) | 0.0 | 0.0 | 0.0 | 0.0
Acquisition of noncontrolling interests |  | 69.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 69.0
Capital contributions from noncontrolling interest | 21.0 | 21.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 21.0
Distributions to noncontrolling interests |  | (2.1) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (2.1)
Stock-based compensation and other |  | 9.6 | 9.6 | 0.0 | 9.6 | 0.0 | 0.0 | 0.0 | 0.0
Balance |  | 10,254.6 | 10,113.4 | 3.2 | 4,186.6 | 5,927.7 | (4.1) | 30.4 | 110.8
Net income attributed to common shareholders | 1,199.9 | 1,199.9 | 1,199.9 | 0.0 | 0.0 | 1,199.9 | 0.0 | 0.0 | 0.0
Net income (loss) attributed to noncontrolling interests | 0.3 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3
Other comprehensive income (loss) | (2.7) | (2.7) | (2.7) | 0.0 | 0.0 | 0.0 | (2.7) | 0.0 | 0.0
Common stock dividends |  | (798.0) | (798.0) | 0.0 | 0.0 | (798.0) | 0.0 | 0.0 | 0.0
Exercise of stock options |  | 43.8 | 43.8 | 0.0 | 43.8 | 0.0 | 0.0 | 0.0 | 0.0
Purchase of common stock | (99.2) | (99.2) | (99.2) | 0.0 | (99.2) | 0.0 | 0.0 | 0.0 | 0.0
Purchase of additional ownership interest in Upstream from noncontrolling interest |  | (31.0) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (31.0)
Acquisition of noncontrolling interests |  | 85.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 85.0
Capital contributions from noncontrolling interest | 0.0 |  |  |  |  |  |  |  |
Distributions to noncontrolling interests |  | (2.7) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (2.7)
Stock-based compensation and other |  | 12.5 | 12.5 | 0.0 | 12.5 | 0.0 | 0.0 | 0.0 | 0.0
Balance |  | 10,662.5 | 10,469.7 | 3.2 | 4,143.7 | 6,329.6 | (6.8) | 30.4 | 162.4
Net income attributed to common shareholders | 1,300.3 | 1,300.3 | 1,300.3 | 0.0 | 0.0 | 1,300.3 | 0.0 | 0.0 | 0.0
Net income (loss) attributed to noncontrolling interests | (3.0) | (3.0) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (3.0)
Other comprehensive income (loss) | 3.6 | 3.6 | 3.6 | 0.0 | 0.0 | 0.0 | 3.6 | 0.0 | 0.0
Common stock dividends |  | (854.8) | (854.8) | 0.0 | 0.0 | (854.8) | 0.0 | 0.0 | 0.0
Exercise of stock options |  | 15.7 | 15.7 | 0.0 | 15.7 | 0.0 | 0.0 | 0.0 | 0.0
Purchase of common stock | (33.1) | (33.1) | (33.1) | 0.0 | (33.1) | 0.0 | 0.0 | 0.0 | 0.0
Acquisition of noncontrolling interests |  | 6.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 6.3
Capital contributions from noncontrolling interest | $ 1.5 | 7.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 7.6
Distributions to noncontrolling interests |  | (4.1) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (4.1)
Stock-based compensation and other |  | 12.3 | 11.8 | 0.0 | 11.8 | 0.0 | 0.0 | 0.0 | 0.5
Balance |  | $ 11,113.3 | $ 10,913.2 | $ 3.2 | $ 4,138.1 | $ 6,775.1 | $ (3.2) | $ 30.4 | $ 169.7

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