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Stock Transactions (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Equity, Class of Treasury Stock [Line Items] |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 55.49 |  |
Treasury Stock Value Acquired Cost Method | $ (6,924,000) | $ (380,345,000) | $ (718,000)
Treasury Stock Value Acquired Cost Method Repurchase Agreement |  | 43,100,000 |
Accelerated Share Repurchases [Line Items] |  |  |
Shares Granted To Non Employee Directors | 14,200 |  |
Warrants Excercised |  | 4,402,078 |
Price Per Warrant |  | $ 35.44 |
Stock Issued During Period Shares Conversion Of Units |  | 5,506,088 |
Incentive Award Tax Settlement [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock Issued During Period, Shares, Treasury Stock Reissued | 369,466 |  |
Treasury Stock, Shares, Acquired | 124,781 |  |
Met Life Inc [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Treasury Stock, Shares, Acquired |  | 3,000,000 |
Treasury Stock Acquired, Average Cost Per Share |  | $ 61.14 |
Repurchase Program 2002 [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Treasury Stock, Shares, Acquired |  | 838,362 |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | 300,000 | 43,400,000
Accelerated Share Repurchase [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Treasury Stock, Shares, Acquired |  | 2,500,000 |
Treasury Stock Acquired, Average Cost Per Share |  | $ 51.39 |
Accelerated Share Repurchases [Line Items] |  |  |
Accelerated Share Repurchases, Initial Price Paid Per Share |  | $ 59.76 |
Accelerated Share Repurchases, Settlement Payment or Receipt |  | $ 149,400,000 |
Accelerated Share Repurchases, Final Price Paid Per Share |  | $ 61.47 |

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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 99-7 -Paragraph 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The price paid per share to immediately purchase the targeted number of shares on the date of executing the accelerated share repurchase agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 99-7 -Paragraph 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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