v2.4.0.6

Stockholders' Equity (Narrative) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Schedule of Capitalization, Equity [Line Items] |  |  |
Authorized capital stock, common stock shares | 1,000,000,000 | 1,000,000,000 |
Common stock par value per share | $ 0.10 | $ 0.1 |
Authorized capital stock, preferred stock shares | 4,500,000 |  |
Preferred stock par value per share | $ 1.00 |  |
Redemption price multiplier | 100 |  |
Authorized repurchase of common shares under share repurchase program | $ 3,500,000,000 |  |
Repurchases of common stock | 3,500,000,000 |  |
Common shares repurchased | 49,200,000 |  |
Repurchase amount of common shares per share | $ 71.18 |  |
Payments of ordinary dividends | 278,000,000 | 281,000,000 | 284,000,000
Common stock, cash paid on dividends, per share | $ 0.67 | $ 0.64 | $ 0.64
Stock Repurchase Program 2010 [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Repurchases of common stock | $ 2,299,000,000 | $ 1,201,000,000 |
Common shares repurchased | 30,900,000 | 18,300,000 |
Repurchase amount of common shares per share | $ 74.49 | $ 65.58 |
Series A Junior Participating Preferred Stock [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Authorized capital stock, preferred stock shares | 2,900,000 |  |
Preferred stock issued | 0 |  |
Preferred stock outstanding | 0 |  |
Cumulative quarterly dividends per share, minimum | $ 1.00 |  |
Preferred stock cumulative quarterly dividends aggregate per share multiplier | 100 |  |
Preferred stock, number of votes per share held | 100 |  |
Maximum [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Common stock, cash paid on dividends, per share | $ 0.17 |  |
Minimum [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Common stock, cash paid on dividends, per share | $ 0.16 |  |

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