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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Millions, unless otherwise specified | 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
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Balances at Dec. 31, 2012 |  | $ 1,057.2 | $ 2,542.7 | $ 131.9 | $ 3,731.8 | $ 526.4 | $ 4,258.2 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 191.2 | 0 | 203.9 | 0 | 203.9 | (12.7) | 191.2 |  |  |  |  |  |  |  |  |  |  |  |
Net change in unrealized gains from investments in unconsolidated affiliates | (81.2) | 0 | 0 | (81.2) | (81.2) | 0 | (81.2) |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  | 0 | 0 | 7.8 | 7.8 | 0 | 7.8 | 0 | 0 | 0.5 | 0.5 | 0.1 | 0.6
Total comprehensive income (loss) | 131.1 | 0 | 203.9 | (72.9) | 131.0 | (12.6) | 118.4 |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common shares |  | 0 | (6.2) | 0 | (6.2) | 0 | (6.2) |  |  |  |  |  |  |  |  |  |  |  |
Dividends to non-controlling interests |  | 0 | 0 | 0 | 0 | (25.1) | (25.1) |  |  |  |  |  |  |  |  |  |  |  |
Repurchases and retirements of common shares | (79.8) | (23.8) | (56.0) | 0 | (79.8) | 0 | (79.8) |  |  |  |  |  |  |  |  |  |  |  |
Issuances of common shares |  | 1.0 | 0 | 0 | 1.0 | 0 | 1.0 |  |  |  |  |  |  |  |  |  |  |  |
Net contributions from non-controlling interests |  | 0 | 0 | 0 | 0 | 7.7 | 7.7 |  |  |  |  |  |  |  |  |  |  |  |
Amortization of restricted share awards |  | 12.2 | 0 | 0 | 12.2 | 0.8 | 13.0 |  |  |  |  |  |  |  |  |  |  |  |
Balances at Sep. 30, 2013 |  | 1,046.6 | 2,684.4 | 59.0 | 3,790.0 | 497.2 | 4,287.2 |  |  |  |  |  |  |  |  |  |  |  |
Balances at Dec. 31, 2013 | 4,397.4 | 1,051.1 | 2,802.3 | 52.1 | 3,905.5 | 491.9 | 4,397.4 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 235.6 | 0 | 242.7 | 0 | 242.7 | (7.1) | 235.6 |  |  |  |  |  |  |  |  |  |  |  |
Net change in unrealized gains from investments in unconsolidated affiliates | 59.5 | 0 | 0 | 59.5 | 59.5 | 0 | 59.5 |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  | 0 | 0 | (100.3) | (100.3) | (0.1) | (100.4) | 0 | 0 | 0.4 | 0.4 | 0 | 0.4
Total comprehensive income (loss) | 202.2 | 0 | 242.7 | (40.4) | 202.3 | (7.2) | 195.1 |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common shares |  | 0 | (6.2) | 0 | (6.2) | 0 | (6.2) |  |  |  |  |  |  |  |  |  |  |  |
Dividends to non-controlling interests |  | 0 | 0 | 0 | 0 | (26.0) | (26.0) |  |  |  |  |  |  |  |  |  |  |  |
Repurchases and retirements of common shares | (106.9) | (29.6) | (77.3) | 0 | (106.9) | 0 | (106.9) |  |  |  |  |  |  |  |  |  |  |  |
Issuances of common shares |  | 2.9 | 0 | 0 | 2.9 | 0 | 2.9 |  |  |  |  |  |  |  |  |  |  |  |
Net contributions from non-controlling interests |  | 0 | 0 | 0 | 0 | 29.4 | 29.4 |  |  |  |  |  |  |  |  |  |  |  |
Amortization of restricted share awards |  | 12.5 | 0 | 0 | 12.5 | 0.6 | 13.1 |  |  |  |  |  |  |  |  |  |  |  |
Balances at Sep. 30, 2014 | $ 4,498.8 | $ 1,036.9 | $ 2,961.5 | $ 11.7 | $ 4,010.1 | $ 488.7 | $ 4,498.8 |  |  |  |  |  |  |  |  |  |  |  |

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