v2.4.0.6

Stockholder's Equity (Details) (USD $) | 1 Months Ended | 2 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 13, 2013 | Feb. 16, 2012 | Feb. 17, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Common Stock Activity [Abstract] |  |  |  |  |  |  |
Shares of Common Stock Sold |  |  |  | 13,570,000 |  |  |
Public Offering Price of Common Stock Sold |  |  |  | $ 105.50 |  |  |
Common Stock, Par (in dollars per share) |  |  |  | $ 0.01 | $ 0.01 |  |
Proceeds From Issuance Or Sale Of Equity |  |  |  | $ 1,388,000,000 |  |  |
An aggregate maximum of shares of common stock authorized for repurchase |  |  |  | 10,000,000 |  |  |
Remaining shares available for purchase under share repurchase authorization |  |  |  | 6,386,200 |  |  |
Dividends Common Stock Cash | $ 0.1875 | $ 0.17 | $ 0.16 |  |  |  |
Common Stock Issued Under Equity Compensation Plans |  |  |  | 2,471,000 | 1,395,000 | 1,482,000 |
Treasury Stock Purchased |  |  |  | (575,000) | (267,000) | (115,000) |
Common Stock Issued Under Employee Stock Purchase Plan |  |  |  | 164,000 | 135,000 | 114,000 |
Treasury Stock Issued Under Other Equity Compensation Plans |  |  |  | 553,000 | 109,000 | 87,000 |
Common Stock Sold |  |  |  |  | 13,570,000 |  |
Common Shares Issued |  |  |  | 271,958,495 | 269,323,084 | 254,223,000 | 252,627,000
Treasury Shares Outstanding |  |  |  | (326,264) | (303,633) | (146,000) | (118,000)
Common Shares Outstanding |  |  |  | 271,632,000 | 269,019,000 | 254,077,000 | 252,509,000
Series E Junior Participating Preferred Stock (Series E) Authorized |  |  |  | 1,500,000 |  |  |
Series E Junior Participating Preferred Stock (Series E) Authorized, total, following two-for-one stock split |  |  |  | 3,000,000 |  |  |

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