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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2011
Share-Based Compensation Plans [Abstract] |
Stock Option Activity [Table Text Block] | Stock option activity for the three years ended December 31, 2011 was:
| 2011 |  | 2010 |  | 2009
| Shares |  | Weighted Average Exercise Price |  | Shares |  | Weighted Average Exercise Price |  | Shares |  | Weighted Average Exercise Price
Balance January 1 | 24,513,590 |  |  | $26.64 |  | 40,832,715 |  |  | $29.37 |  | 23,398,301 |  |  | $36.87
Options granted under 2007 Plan | 90,000 |  |  | $45.05 |  | 335,000 |  |  | $38.86 |  | 22,620,000 |  |  | $23.73
Options exercised | (6,034,181 | ) |  | $28.17 |  | (14,125,525 | ) |  | $33.03 |  | (545,586 | ) |  | $31.18
Options forfeited | (268,000 | ) |  | $27.15 |  | (2,528,600 | ) |  | $36.58 |  | (4,640,000 | ) |  | $39.52
Balance December 31 | 18,301,409 |  |  | $26.22 |  | 24,513,590 |  |  | $26.64 |  | 40,832,715 |  |  | $29.37
Options exercisable December 31 | 9,672,909 |  |  | $27.85 |  | 7,885,090 |  |  | $31.80 |  | 16,325,715 |  |  | $37.46
Options Oustanding and Exercisable [Table Text Block] | Options outstanding and exercisable at December 31, 2011 were:
|  |  |  | Options Outstanding |  | Options Exercisable
Range of Exercise Prices |  | Shares |  | Weighted Average Remaining Contractual Life |  | Weighted Average Exercise Price |  | Shares |  | Weighted Average Exercise Price
$23.40 | to | $29.99 |  | 16,023,515 |  |  | 7.2 years |  | $23.72 |  | 7,945,515 |  |  | $24.05
$30.00 | to | $44.99 |  | 856,894 |  |  | 7.1 years |  | $37.93 |  | 371,394 |  |  | $38.24
$45.00 | to | $52.83 |  | 1,421,000 |  |  | 1.0 years |  | $47.30 |  | 1,356,000 |  |  | $47.30
|  |  |  | 18,301,409 |  |  |  |  |  |  | 9,672,909 |  |  |
Black-Scholes Assumptions and Weighted Average Fair Value Per Share for Options Granted [Table Text Block] | The Black-Scholes assumptions (without adjusting for the risk of forfeiture and lack of liquidity) and the weighted average fair value per share for options granted were:
| 2011 |  | 2010 |  | 2009
Expected option lives | 5.0 years |  | 5.0 years |  | 5.0 years
Risk free interest rate | 0.9 | % | - | 1.8% |  | 1.8 | % | - | 2.6% |  | 1.7 | % | - | 2.5%
Expected volatility | 27.2 | % | - | 29.2% |  | 24.7 | % | - | 27.0% |  | 19.6 | % | - | 24.1%
Dividend yield | 2.3% - 2.8% |  | 1.9% - 2.4% |  | 1.5% - 2.5%
Weighted average fair value per option granted | $9.57 |  | $8.25 |  | $3.62
Restricted Stock Activity [Table Text Block] | Restricted stock activity for the three years ended December 31, 2011 was:
| 2011 |  | 2010 |  | 2009
Balance January 1 | 3,026,086 |  |  | 3,471,929 |  |  | 4,473,981 |
Shares granted | 4,688,716 |  |  | 868,273 |  |  | 664,217 |
Shares vested | (1,096,441 | ) |  | (1,089,136 | ) |  | (1,426,456 | )
Shares forfeited | (165,474 | ) |  | (224,980 | ) |  | (239,813 | )
Balance December 31 | 6,452,887 |  |  | 3,026,086 |  |  | 3,471,929 |
Weighted average per share fair value of shares granted | $ | 44.87 |  |  | $ | 36.63 |  |  | $ | 32.87 |
Weighted average per share fair value at December 31 | $ | 43.66 |  |  | $ | 41.79 |  |  | $ | 44.04 |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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