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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions | Total | Common shares and paid-in surplus | Retained earnings | AOCI, after tax | Total | Non-controlling interest | Total Equity | Foreign Currency Gain (Loss) [Member] Common shares and paid-in surplus | Foreign Currency Gain (Loss) [Member] Retained earnings | Foreign Currency Gain (Loss) [Member] AOCI, after tax | Foreign Currency Gain (Loss) [Member] Total | Foreign Currency Gain (Loss) [Member] Non-controlling interest | Foreign Currency Gain (Loss) [Member] Total Equity | Pension liability and other accumulated comprehensive items [Member] Common shares and paid-in surplus | Pension liability and other accumulated comprehensive items [Member] Retained earnings | Pension liability and other accumulated comprehensive items [Member] AOCI, after tax | Pension liability and other accumulated comprehensive items [Member] Total | Pension liability and other accumulated comprehensive items [Member] Non-controlling interest | Pension liability and other accumulated comprehensive items [Member] Total Equity
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2013 |  | $ 1,051.1 | $ 2,801.8 | $ 52.1 | $ 3,905.0 | $ 491.8 | $ 4,396.8 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ 235.1 | 0.0 | 242.3 | 0.0 | 242.3 | (7.2) | 235.1 |  |  |  |  |  |  |  |  |  |  |  |
Net change in unrealized gains (losses) from investments in unconsolidated affiliates | 59.5 | 0.0 | 0.0 | 59.5 | 59.5 | 0.0 | 59.5 |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ (100.3) | $ (100.3) | $ (0.1) | $ (100.4) | $ 0.0 | $ 0.0 | $ 0.4 | $ 0.4 | $ 0.0 | $ 0.4
Total comprehensive income (loss) | 201.8 | 0.0 | 242.3 | (40.4) | 201.9 | (7.3) | 194.6 |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common shares |  | 0.0 | (6.2) | 0.0 | (6.2) | 0.0 | (6.2) |  |  |  |  |  |  |  |  |  |  |  |
Dividends to non-controlling interests | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | (26.0) | (26.0) |  |  |  |  |  |  |  |  |  |  |  |
Repurchases and retirements of common shares |  | (29.6) | (77.3) | 0.0 | (106.9) | 0.0 | (106.9) |  |  |  |  |  |  |  |  |  |  |  |
Issuances of common shares |  | 2.9 | 0.0 | 0.0 | 2.9 | 0.0 | 2.9 |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Period Increase (Decrease) |  | 0.0 | 0.0 | 0.0 | 0.0 | 29.4 | 29.4 |  |  |  |  |  |  |  |  |  |  |  |
Amortization of restricted share awards |  | 12.5 | 0.0 | 0.0 | 12.5 | 0.6 | 13.1 |  |  |  |  |  |  |  |  |  |  |  |
Balances at Sep. 30, 2014 |  | 1,036.9 | 2,960.6 | 11.7 | 4,009.2 | 488.5 | 4,497.7 |  |  |  |  |  |  |  |  |  |  |  |
Balances at Dec. 31, 2014 | 4,538.4 | 1,034.7 | 3,010.5 | (49.5) | 3,995.7 | 542.7 | 4,538.4 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 5.5 | 0.0 | 29.7 | 0.0 | 29.7 | (24.2) | 5.5 |  |  |  |  |  |  |  |  |  |  |  |
Net change in unrealized gains (losses) from investments in unconsolidated affiliates | (29.4) | 0.0 | 0.0 | (29.4) | (29.4) | 0.0 | (29.4) |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ (62.6) | $ (62.6) | $ 0.0 | $ (62.6) | $ 0.0 | $ 0.0 | $ 0.7 | $ 0.7 | $ 0.1 | $ 0.8
Total comprehensive income (loss) | (61.5) | 0.0 | 29.7 | (91.3) | (61.6) | (24.1) | (85.7) |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common shares |  | 0.0 | (6.0) | 0.0 | (6.0) | 0.0 | (6.0) |  |  |  |  |  |  |  |  |  |  |  |
Dividends to non-controlling interests | 9.1 | 0.0 | 0.0 | 0.0 | 0.0 | (35.4) | (35.4) |  |  |  |  |  |  |  |  |  |  |  |
Repurchases and retirements of common shares |  | (46.0) | (145.9) | 0.0 | (191.9) | 0.0 | (191.9) |  |  |  |  |  |  |  |  |  |  |  |
Issuances of common shares |  | 0.9 | 0.0 | 0.0 | 0.9 | 0.0 | 0.9 |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  | 0.0 | 0.0 | 0.0 | 0.0 | (31.5) | (31.5) |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Additional Interest Issued to Parent |  | (2.2) | 0.0 | 0.0 | (2.2) | (2.7) | (4.9) |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Period Increase (Decrease) |  | 0.0 | 0.0 | 0.0 | 0.0 | 12.1 | 12.1 |  |  |  |  |  |  |  |  |  |  |  |
Amortization of restricted share awards |  | 10.6 | 0.0 | 0.0 | 10.6 | (0.3) | 10.3 |  |  |  |  |  |  |  |  |  |  |  |
Balances at Sep. 30, 2015 | $ 4,206.3 | $ 998.0 | $ 2,888.3 | $ (140.8) | $ 3,745.5 | $ 460.8 | $ 4,206.3 |  |  |  |  |  |  |  |  |  |  |  |

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