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Long-term Equity-based Compensation Plans Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range (Details) (USD $) | 9 Months Ended |
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Sep. 30, 2013 | Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 2,792,048 | 3,192,054
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 40.50 | $ 40.53
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 3 years 10 months 21 days |
Range of Exercise Prices $10.00 - $15.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 10.00 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 15.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 26,750 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 13.55 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 5 years 4 months 6 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 26,750 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 13.55 |
Range of Exercise Prices $15.01 - $20.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 15.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 20.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 8,000 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 16.48 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 5 years 7 months 6 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 8,000 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 16.48 |
Range of Exercise Prices $20.01 - $25.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 20.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 25.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 116,250 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 23.58 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 6 years 4 months 2 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 111,250 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 23.63 |
Range of Exercise Prices $25.01 - $30.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 25.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 30.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 475,250 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 28.74 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 7 years 8 months 5 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 322,062 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 28.61 |
Range of Exercise Prices $30.01 - $35.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 30.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 35.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 262,750 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 33.17 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 9 years 4 months 13 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 95,685 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 32.67 |
Range of Exercise Prices $35.01 - $40.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 35.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 40.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 326,000 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 37.22 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 4 years 1 month 10 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 326,000 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 37.22 |
Range of Exercise Prices $40.01 - $45.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 40.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 45.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 360,618 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 43.58 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 0 years 10 months 10 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 360,618 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 43.58 |
Range of Exercise Prices $45.01 - $50.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 45.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 50.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 979,722 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 48.64 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 2 years 0 months 26 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 979,722 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 48.64 |
Range of Exercise Prices $50.01 - $55.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 50.01 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 55.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 236,708 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 50.51 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 0 years 7 months 10 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 236,708 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 50.51 |
Range of Exercise Prices $10.00 - $50.00 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ 10.00 |
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ 55.00 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Number | 2,792,048 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price | $ 40.50 |
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term | 3 years 10 months 21 days |
Options and Stock Appreciation Rights, Exercisable at End of Period, Number | 2,466,795 |
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price | $ 41.72 |

X
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 Number of options outstanding, including both vested and non-vested options. + References Reference 1: 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 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 Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 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 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 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 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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