v2.4.0.6

Stockholders' Equity (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 12 Months Ended | 3 Months Ended | 8 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Mar. 31, 2011 Accelerated Stock Buyback Program [Member] | Mar. 24, 2011 Accelerated Stock Buyback Program [Member] | Dec. 31, 2010 Accelerated Stock Buyback Program [Member] | Dec. 31, 2011 Share Repurchase Plan [Member] | Aug. 31, 2014 Share Repurchase Plan [Member] | Dec. 31, 2010 $550million Medium Term Notes [Member] | Dec. 31, 2011 $550million Medium Term Notes [Member] | Dec. 31, 2010 $300million Medium Term Notes [Member] | Dec. 31, 2010 $345million Converitble Notes [Member] | Dec. 31, 2011 $345million Convertible Notes March 2011 Exchange [Member]
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  | $ 300,000,000 |  |  |  |  |  |
Stock Repurchase Program, Period in Force |  |  |  |  |  |  |  | 3 |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  | 2.0 |  | 25.8 | 3.4 |  |  |  |  |  |
Stock Repurchased and Retired During Period, Value |  | 500,100,000 |  |  |  |  | 46,100,000 |  |  |  |  |  |
Principal amount of note |  |  |  |  |  |  |  |  |  | 550,000,000 | 300,000,000 | 345,000,000 |
Debt Instrument, Convertible, Conversion Ratio |  | 116.198 |  |  |  |  |  |  |  |  |  |  |
Convertible Debt Exchange Cash Paid Per Unit |  |  |  |  |  |  |  |  |  |  |  | $ 160 |
Convertible Notes Face Value Subject To Exchange Min |  | 1,000 |  |  |  |  |  |  |  |  |  |  |
Carrying Value of Convertible Notes Exchanged |  | 324,700,000 |  |  |  |  |  |  |  |  |  |  | 20,300,000
Shares issued for exchange of convertible notes, Shares |  | 37.7 |  |  |  |  |  |  |  |  |  |  |
Shares issued for exchange of convertible notes | 44,700,000 | 638,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  | 4.70% | 10.60% |  |
Debt Instrument, Maturity Date |  |  |  |  |  |  |  |  | Aug. 15, 2020 |  | Apr. 15, 2019 | Mar. 15, 2014 |
Repurchase of shares of common stock, value | 46,100,000 | 500,100,000 | 0 |  |  | 500,000,000 |  |  |  |  |  |  |
Daily volume-weighted average share price |  |  |  |  | $ 17.95 |  |  |  |  |  |  |  |
Shares value issued for exchange of convertible notes |  |  |  |  |  |  |  |  |  |  |  |  | 44,700,000
Convertible Debt Exchange Cash Paid |  | 52,000,000 |  |  |  |  |  |  |  |  |  |  | 3,100,000
Extinguishment of equity component of convertible notes | 25,800,000 | 334,400,000 |  |  |  |  |  |  |  |  |  |  | 25,800,000
Proceeds from settlement of call options | 0 | 369,500,000 | 0 |  |  |  |  |  |  |  |  |  |
Payments for Repurchase of Warrants | $ 0 | $ 298,400,000 | $ 0 |  |  |  |  |  |  |  |  |  |
Shares Issued For Exchange Of Convertible Notes, Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  | 2.3

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