|
Investments Fair Value (Details) (USD $)
In Millions, unless otherwise specified
|
Jun. 30, 2014
|
Dec. 31, 2013
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
$ 8,424.5 |
$ 8,712.3 |
| Available-for-sale, equity securities |
1,390.2 |
1,004.2 |
| Short-term investments |
1,290.1 |
1,124.8 |
| Trading equity portfolio |
33.8 |
0 |
|
Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments |
1,286.2 |
1,120.5 |
| Trading equity portfolio |
33.8 |
|
|
Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments |
0 |
0 |
| Trading equity portfolio |
0 |
|
|
Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments |
3.8 |
4.2 |
| Trading equity portfolio |
0 |
|
|
Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Short-term investments |
1,290.1 |
1,124.8 |
| Trading equity portfolio |
33.8 |
|
|
U.S. & Canadian Governments [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
1,141.3 |
1,161.1 |
|
U.S. & Canadian Governments [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
464.5 |
478.9 |
|
U.S. & Canadian Governments [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
676.8 |
682.2 |
|
U.S. & Canadian Governments [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
0 |
0 |
|
U.S. & Canadian Governments [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
1,141.3 |
1,161.1 |
|
Tax-exempt [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
98.3 |
171.3 |
|
Tax-exempt [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
0 |
0 |
|
Tax-exempt [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
98.3 |
171.3 |
|
Tax-exempt [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
0 |
0 |
|
Tax-exempt [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
98.3 |
171.3 |
|
Corporate [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
7,184.8 |
7,379.8 |
|
Corporate [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
0 |
0 |
|
Corporate [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
7,174.3 |
7,369.3 |
|
Corporate [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
10.5 |
10.5 |
|
Corporate [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available for sale, Fixed maturity securities |
7,184.8 |
7,379.8 |
|
Equity Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-sale, equity securities |
1,390.2 |
1,004.2 |
|
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-sale, equity securities |
1,389.4 |
1,003.4 |
|
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-sale, equity securities |
0 |
0 |
|
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-sale, equity securities |
0.8 |
0.7 |
|
Equity Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-sale, equity securities |
$ 1,390.2 |
$ 1,004.2 |