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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Statement of Comprehensive Income [Abstract] |  |
Net loss attributable to White Mountains’s common shareholders | $ (75.3) | $ (128.8)
Other comprehensive income (loss), net of tax | 1.8 | (3.4)
Comprehensive loss | (73.5) | (132.2)
Other comprehensive income attributable to non-controlling interests | (0.1) | 0.0
Comprehensive loss attributable to White Mountains’s common shareholders | $ (73.6) | $ (132.2)
Basic (loss) earnings per share |  |
Continuing operations (in usd per share) | $ (30.33) | $ (40.82)
Discontinued operations (in usd per share) | 6.03 | 0.28
Total consolidated operations (in usd per share) | (24.30) | (40.54)
Diluted (loss) earnings per share |  |
Continuing operations (in usd per share) | (30.33) | (40.82)
Discontinued operations (in usd per share) | 6.03 | 0.28
Total consolidated operations (in usd per share) | (24.30) | (40.54)
Dividends declared per White Mountains’s common share (in USD per share) | $ 1.00 | $ 1.00

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