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Common and Preferred Shares and Warrants (Details)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Authorized shares and a reconciliation of common shares issued and outstanding | |||
| Common shares, authorized | 3,600,000,000 | 3,600,000,000 | 3,600,000,000 |
| Shares issued and outstanding at beginning of year | 1,105,000,000 | 1,164,000,000 | 1,197,000,000 |
| Repurchases of common shares | (55,000,000) | (69,000,000) | (48,000,000) |
| Other, primarily stock option exercises and RSAs granted | 14,000,000 | 10,000,000 | 15,000,000 |
| Shares issued and outstanding as of December 31 | 1,064,000,000 | 1,105,000,000 | 1,164,000,000 |
| Stockholders' Equity Note (Textuals) [Abstract] | |||
| Shares reserved for issuance under employee stock and employee benefit plans | 63,000,000 | ||