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Share-Based Compensation Plans (Details 2) (USD $) | 12 Months Ended
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Dec. 31, 2011 Y
Stock Option Plans |
Range of exercise price, lower limit (in dollars per share) | $ 15
Range of exercise price, upper limit (in dollars per share) | $ 67
Options Outstanding (in shares) | 4,515,560
Options Outstanding, Weighted Average Remaining Contractual Life In Years | 4.4
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 47.39
Options Exercisable (in shares) | 2,146,035
Weighted Average Exercise Price of Options Exercisable | $ 46.59
Range of Exercise Price $15 - $19 |
Stock Option Plans |
Range of exercise price, lower limit (in dollars per share) | $ 15
Range of exercise price, upper limit (in dollars per share) | $ 19
Options Outstanding (in shares) | 24,000
Options Outstanding, Weighted Average Remaining Contractual Life In Years | 3.4
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 18.31
Options Exercisable (in shares) | 24,000
Weighted Average Exercise Price of Options Exercisable | $ 18.31
Range of Exercise Price $24 - $28 |
Stock Option Plans |
Range of exercise price, lower limit (in dollars per share) | $ 24
Range of exercise price, upper limit (in dollars per share) | $ 28
Options Outstanding (in shares) | 50,925
Options Outstanding, Weighted Average Remaining Contractual Life In Years | 3.5
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 25.02
Options Exercisable (in shares) | 50,925
Weighted Average Exercise Price of Options Exercisable | $ 25.02
Range of Exercise Price $33 - $38 |
Stock Option Plans |
Range of exercise price, lower limit (in dollars per share) | $ 33
Range of exercise price, upper limit (in dollars per share) | $ 38
Options Outstanding (in shares) | 790,675
Options Outstanding, Weighted Average Remaining Contractual Life In Years | 4.5
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 33.90
Options Exercisable (in shares) | 373,725
Weighted Average Exercise Price of Options Exercisable | $ 34.11
Range of Exercise Price $42 - $45 |
Stock Option Plans |
Range of exercise price, lower limit (in dollars per share) | $ 42
Range of exercise price, upper limit (in dollars per share) | $ 45
Options Outstanding (in shares) | 1,620,435
Options Outstanding, Weighted Average Remaining Contractual Life In Years | 4.0
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 43.68
Options Exercisable (in shares) | 913,635
Weighted Average Exercise Price of Options Exercisable | $ 44.36
Range of Exercise Price $55 - $57 |
Stock Option Plans |
Range of exercise price, lower limit (in dollars per share) | $ 55
Range of exercise price, upper limit (in dollars per share) | $ 57
Options Outstanding (in shares) | 1,963,525
Options Outstanding, Weighted Average Remaining Contractual Life In Years | 4.7
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 56.25
Options Exercisable (in shares) | 717,750
Weighted Average Exercise Price of Options Exercisable | $ 56.80
Range of Exercise Price $61 - $67 |
Stock Option Plans |
Range of exercise price, lower limit (in dollars per share) | $ 61
Range of exercise price, upper limit (in dollars per share) | $ 67
Options Outstanding (in shares) | 66,000
Options Outstanding, Weighted Average Remaining Contractual Life In Years | 5.9
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 64.03
Options Exercisable (in shares) | 66,000
Weighted Average Exercise Price of Options Exercisable | $ 64.03

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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c) -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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a, b) -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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average period remaining as of the balance sheet date until option expiration pertaining to the outstanding stock options for all option plans in the customized range of exercise prices, which may be expressed in a variety of ways (for example, years, months). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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