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Stock Transactions (Narrative) (Details) (USD $) | 12 Months Ended | 1 Months Ended | 0 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Incentive Award Tax Settlement [Member] | Dec. 31, 2012 Met Life Inc [Member] | Dec. 31, 2011 Repurchase Program 2002 [Member] | Dec. 31, 2011 Accelerated Share Repurchase [Member] | Jan. 24, 2013 January Two Thousand Thirteen Share Repurchase Authorization [Member] | Apr. 18, 2013 April Two Thousand Thirteen Share Repurchase Authorization [Member] | Jul. 18, 2013 July Two Thousand Thirteen Share Repurchase Authorization [Member] | Feb. 20, 2014 Subsequent Event [Member]
Stock Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Treasury Stock Reissued |  |  |  | 346,561 |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired | 4,151,312 |  |  | 125,829 | 3,000,000 | 838,362 | 2,500,000 |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 64.13 |  |  |  | $ 61.14 |  | $ 51.39 |  |  |  |
Shares Granted To Non Employee Directors | 14,200 |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  | $ 200,000,000.0 | $ 100,000,000.0 | $ 100,000,000.0 | $ 300,000,000.0
Treasury Stock Value Acquired Cost Method Repurchase Agreement | 261,300,000 |  | 43,100,000 |  |  |  |  |  |  |  |
Accelerated Share Repurchases, Initial Price Paid Per Share |  |  |  |  |  |  | $ 59.76 |  |  |  |
Accelerated Share Repurchases, Settlement Payment or Receipt |  |  |  |  |  |  | 149,400,000 |  |  |  |
Accelerated Share Repurchases, Adjustment to Recorded Amount |  |  | 4,300,000 |  |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share |  |  |  |  |  |  | $ 61.47 |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  |  |  | 43,400,000 |  |  |  |  |
Warrants Excercised |  | 4,402,078 |  |  |  |  |  |  |  |  |
Price Per Warrant |  |  | $ 35.44 |  |  |  |  |  |  |  |
Stock Issued During Period Shares Conversion Of Units |  | 5,506,088 | 5,506,088 |  |  |  |  |  |  |  |

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