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Fair Value Measurements - Level 3 Inputs Reconciliation (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | $ 732,100,000 | $ 661,100,000 | $ 713,900,000 | $ 626,700,000
Included in Condensed Consolidated Statements of Operations | 300,000 | (200,000) | (2,800,000) | 200,000
Included in Other Comprehensive Income | (300,000) | 4,500,000 | 1,200,000 | 17,800,000
Purchases | 235,400,000 | 96,500,000 | 287,300,000 | 159,700,000
Settlements | (20,500,000) | (37,200,000) | (34,300,000) | (68,200,000)
Sales | (46,900,000) | (8,400,000) | (65,500,000) | (19,300,000)
Transfers into Level 3 | 800,000 | 0 | 4,900,000 | 0
Transfers out of Level 3 | (16,900,000) | 0 | (20,700,000) | (600,000)
Balance at End of Period | 884,000,000 | 716,300,000 | 884,000,000 | 716,300,000
Fair Value, Level 1 to level 2 Transfers, Amount | 0 | 0 | 0 | 0
Fair Value, Level 2 to Level 1 Transfers, Amount | 0 | 0 | 0 | 0
Fair Value, Level 1 to level 3 Transfers, Amount | 0 | 0 | 0 | 0
Fair Value, Level 3 to level 1 Transfers, Amount | 0 | 0 | 0 | 0
Corporate Bonds and Notes [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | 374,800,000 | 379,400,000 | 360,600,000 | 364,100,000
Included in Condensed Consolidated Statements of Operations | (800,000) | (2,400,000) | (3,100,000) | (2,300,000)
Included in Other Comprehensive Income | (3,800,000) | 2,900,000 | (1,400,000) | 5,400,000
Purchases | 89,100,000 | 37,600,000 | 125,300,000 | 85,900,000
Settlements | (2,700,000) | (26,000,000) | (6,900,000) | (50,800,000)
Sales | (37,700,000) | (6,700,000) | (55,600,000) | (16,900,000)
Transfers into Level 3 | 0 |  | 0 |
Transfers out of Level 3 | (12,300,000) |  | (12,300,000) | (600,000)
Balance at End of Period | 406,600,000 | 384,800,000 | 406,600,000 | 384,800,000
Redeemable Preferred Stocks [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | 6,400,000 | 7,500,000 | 6,700,000 | 7,400,000
Included in Condensed Consolidated Statements of Operations | (500,000) | 0 | (500,000) | 0
Included in Other Comprehensive Income | (300,000) | (300,000) | (600,000) | (100,000)
Purchases | 0 | 0 | 0 | 0
Settlements | (200,000) | (100,000) | (200,000) | (200,000)
Sales | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 |  | 0 |
Transfers out of Level 3 | 0 |  | 0 | 0
Balance at End of Period | 5,400,000 | 7,100,000 | 5,400,000 | 7,100,000
Collateralized Loan Obligations [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | 69,900,000 | 45,000,000 | 64,400,000 | 44,700,000
Included in Condensed Consolidated Statements of Operations | 300,000 | 100,000 | 400,000 | 100,000
Included in Other Comprehensive Income | (100,000) | (400,000) | 1,200,000 | (100,000)
Purchases | 15,300,000 | 4,800,000 | 19,400,000 | 4,800,000
Settlements | (7,500,000) | 0 | (7,500,000) | 0
Sales | (7,500,000) | 0 | (7,500,000) | 0
Transfers into Level 3 | 0 |  | 0 |
Transfers out of Level 3 | 0 |  | 0 | 0
Balance at End of Period | 70,400,000 | 49,500,000 | 70,400,000 | 49,500,000
Other Mortgage- and Asset-backed [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | 3,900,000 | 3,800,000 | 3,900,000 | 4,500,000
Included in Condensed Consolidated Statements of Operations | 0 | 0 | 0 | 100,000
Included in Other Comprehensive Income | 100,000 | 100,000 | 100,000 | 100,000
Purchases | 1,300,000 | 0 | 1,300,000 | 0
Settlements | (100,000) | 0 | (100,000) | (800,000)
Sales | (1,200,000) | 0 | (1,200,000) | 0
Transfers into Level 3 | 0 |  | 0 |
Transfers out of Level 3 | 0 |  | 0 | 0
Balance at End of Period | 4,000,000 | 3,900,000 | 4,000,000 | 3,900,000
Preferred and Common Stocks [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | 33,200,000 | 38,100,000 | 38,800,000 | 32,100,000
Included in Condensed Consolidated Statements of Operations | (400,000) | 2,300,000 | (1,200,000) | 2,300,000
Included in Other Comprehensive Income | 2,900,000 | (1,400,000) | 2,200,000 | 2,000,000
Purchases | 6,600,000 | 100,000 | 7,000,000 | 2,700,000
Settlements | (300,000) | (2,800,000) | (300,000) | (2,800,000)
Sales | (500,000) | 0 | (1,200,000) | 0
Transfers into Level 3 | 800,000 |  | 800,000 |
Transfers out of Level 3 | (4,600,000) |  | (8,400,000) | 0
Balance at End of Period | 37,700,000 | 36,300,000 | 37,700,000 | 36,300,000
Other Equity Interests [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | 189,700,000 | 187,300,000 | 186,200,000 | 173,900,000
Included in Condensed Consolidated Statements of Operations | (100,000) | (500,000) | (1,100,000) | (300,000)
Included in Other Comprehensive Income | 900,000 | 3,600,000 | (300,000) | 10,500,000
Purchases | 19,100,000 | 14,000,000 | 30,300,000 | 26,300,000
Settlements | (9,700,000) | (8,300,000) | (19,300,000) | (13,600,000)
Sales | 0 | (1,700,000) | 0 | (2,400,000)
Transfers into Level 3 | 0 |  | 4,100,000 |
Transfers out of Level 3 | 0 |  | 0 | 0
Balance at End of Period | 199,900,000 | 194,400,000 | 199,900,000 | 194,400,000
Fair Value Option Investments [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at Beginning of Period | 54,200,000 | 0 | 53,300,000 | 0
Included in Condensed Consolidated Statements of Operations | 1,800,000 | 300,000 | 2,700,000 | 300,000
Included in Other Comprehensive Income | 0 | 0 | 0 | 0
Purchases | 104,000,000 | 40,000,000 | 104,000,000 | 40,000,000
Settlements | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 |  | 0 |
Transfers out of Level 3 | 0 |  | 0 | 0
Balance at End of Period | $ 160,000,000 | $ 40,300,000 | $ 160,000,000 | $ 40,300,000

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- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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