 
 
    | Contractual/ Notional Amount | Balance Sheet Location | Estimated Fair Value | |||||||||||
| Asset | (Liability) | ||||||||||||
| December 31, 2013 | |||||||||||||
| Hedging instruments | |||||||||||||
| Interest rate swaps | $ | 1,660.0 | Other assets/other liabilities | $ | 30.9 | $ | (20.7 | ) | |||||
| Non-hedging instruments | |||||||||||||
| Derivatives embedded in convertible securities | 295.0 | Fixed maturity securities | 89.2 | — | |||||||||
| Interest rate swaps | 72.6 | Equity securities  | 1.8 | (2.5 | ) | ||||||||
| Options | 7,891.6 | Equity securities/other assets | 776.5 | (787.7 | ) | ||||||||
| Futures | — | Equity securities  | 3.5 | (1.6 | ) | ||||||||
| Subtotal non-hedging | 8,259.2 | Subtotal non-hedging | 871.0 | (791.8 | ) | ||||||||
| Total derivatives | $ | 9,919.2 | Total derivatives | 901.9 | (812.5 | ) | |||||||
| Amounts netted | (791.8 | ) | 791.8 | ||||||||||
| Net derivatives | $ | 110.1 | $ | (20.7 | ) | ||||||||
| December 31, 2012 | |||||||||||||
| Hedging instruments | |||||||||||||
| Interest rate swaps | $ | 1,650.0 | Other assets/other liabilities | $ | 58.6 | $ | (0.1 | ) | |||||
| Non-hedging instruments | |||||||||||||
| Derivatives embedded in convertible securities | 278.8 | Fixed maturity securities | 67.2 | — | |||||||||
| Credit default and interest rate swaps | 95.9 | Equity securities  | — | (7.3 | ) | ||||||||
| Options | 6,271.8 | Equity securities  | 385.6 | (411.2 | ) | ||||||||
| Futures | — | Equity securities  | 2.1 | (0.4 | ) | ||||||||
| Subtotal non-hedging | 6,646.5 | Subtotal non-hedging | 454.9 | (418.9 | ) | ||||||||
| Total derivatives | $ | 8,296.5 | Total derivatives | 513.5 | (419.0 | ) | |||||||
| Amounts netted | (418.9 | ) | 418.9 | ||||||||||
| Net derivatives | $ | 94.6 | $ | (0.1 | ) | ||||||||
| Type of Fair Value Hedges | Year Entered Into | Outstanding Notional Amount | Interest Rate Received | Expiration Date | |||||||||||
| 2013 | 2012 | ||||||||||||||
| Interest rate swap | 2013 | $ | 10.0 | $ | — | 4.350 | % | August 15, 2020 | |||||||
| Interest rate swap | 2012 | 200.0 | 200.0 | 4.350 | August 15, 2020 | ||||||||||
| Interest rate swap | 2012 | 625.0 | 625.0 | 1.875 | January 15, 2018 | ||||||||||
| Interest rate swap | 2012 | 200.0 | 200.0 | 2.375 | February 15, 2017 | ||||||||||
| Interest rate swap | 2011 | 200.0 | 200.0 | 5.250 | January 15, 2016 | ||||||||||
| Interest rate swap | 2010 | 25.0 | 25.0 | 5.250 | January 15, 2016 | ||||||||||
| Interest rate swap | 2006 | 200.0 | 200.0 | 5.000 | December 15, 2014 | ||||||||||
| Interest rate swap | 2005 | 200.0 | 200.0 | 5.000 | December 15, 2014 | ||||||||||
| Total notional amount outstanding | $ | 1,660.0 | $ | 1,650.0 | |||||||||||
| Type of Fair Value Hedges | Income Statement Location of Hedge Gain | Hedge Gain Recognized | Hedged Item | Income Statement Location of Hedged Item Loss | Hedged Item Loss Recognized | |||||||||
| Year ended December 31, 2013 | ||||||||||||||
| Interest rate swaps | Interest expense | $ | 31.5 | Fixed rate debt | Interest expense | $ | (31.5 | ) | ||||||
| Year ended December 31, 2012 | ||||||||||||||
| Interest rate swaps | Interest expense | $ | 38.2 | Fixed rate debt | Interest expense | $ | (38.2 | ) | ||||||
| Year ended December 31, 2011 | ||||||||||||||
| Interest rate swaps | Interest expense | $ | 45.1 | Fixed rate debt | Interest expense | $ | (45.1 | ) | ||||||
| Effective Portion | ||||||||||||||||
| Pretax Hedge Loss Recognized in Other Comprehensive (Loss) Income | Income Statement Location of Loss Reclassification from Accumulated Other Comprehensive Income | Hedge Loss Reclassified from Accumulated Other Comprehensive Income | Ineffective Portion | |||||||||||||
| Type of Cash Flow Hedge | Income Statement Location of Loss Recognized | Hedge Loss Recognized | ||||||||||||||
| Year ended December 31, 2013 | ||||||||||||||||
| Forward starting pay fixed swaps | $ | — | Interest expense | $ | (4.6 | ) | None | $ | — | |||||||
| Year ended December 31, 2012 | ||||||||||||||||
| Forward starting pay fixed swaps | $ | (4.0 | ) | Interest expense | $ | (4.2 | ) | Interest expense | $ | (0.1 | ) | |||||
| Year ended December 31, 2011 | ||||||||||||||||
| Forward starting pay fixed swaps | $ | (18.2 | ) | Interest expense | $ | (1.8 | ) | None | $ | — | ||||||
| Type of Non-hedging Derivatives | Income Statement Location of Gain (Loss) Recognized | Derivative Gain (Loss) Recognized | ||||
| Year ended December 31, 2013 | ||||||
| Derivatives embedded in convertible securities | Net realized gains on investments | $ | 31.5 | |||
| Interest rate swaps | Net realized gains on investments | 2.2 | ||||
| Options | Net realized gains on investments | (111.7 | ) | |||
| Futures | Net realized gains on investments | 22.3 | ||||
| Swaptions | Net realized gains on investments | $ | 3.0 | |||
| Total | $ | (52.7 | ) | |||
| Year ended December 31, 2012 | ||||||
| Derivatives embedded in convertible securities | Net realized gains on investments | $ | (2.4 | ) | ||
| Credit default and interest rate swaps | Net realized gains on investments | (3.9 | ) | |||
| Options | Net realized gains on investments | (66.0 | ) | |||
| Futures | Net realized gains on investments | (6.7 | ) | |||
| Total | $ | (79.0 | ) | |||
| Year ended December 31, 2011 | ||||||
| Derivatives embedded in convertible securities | Net realized gains on investments | $ | (7.6 | ) | ||
| Credit default and interest rate swaps | Net realized gains on investments | (53.3 | ) | |||
| Options | Net realized gains on investments | 9.6 | ||||
| Futures | Net realized gains on investments | (5.9 | ) | |||
| Total | $ | (57.2 | ) | |||