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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 $)
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9 Months Ended |
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Sep. 30, 2012
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Dec. 31, 2011
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
3,429,804 |
3,632,398 |
| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 38.93 |
$ 40.70 |
| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
4 years 5 months 1 day |
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Range of Exercise Prices $10.00 - $15.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 10.00 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 15.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
204,500 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 13.55 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
6 years 4 months 6 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
204,500 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 13.55 |
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Range of Exercise Prices $15.01 - $20.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 15.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 20.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
8,000 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 16.48 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
6 years 7 months 6 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
8,000 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 16.48 |
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Range of Exercise Prices $20.01 - $25.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 20.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 25.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
313,750 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 23.74 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
7 years 6 months 7 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
176,312 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 23.64 |
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Range of Exercise Prices $25.01 - $30.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 25.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 30.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
636,000 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 28.56 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
8 years 3 months 15 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
292,373 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 28.03 |
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Range of Exercise Prices $30.01 - $35.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 30.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 35.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
6,614 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 31.92 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
6 years 1 month 2 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
2,614 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 31.18 |
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Range of Exercise Prices $35.01 - $40.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 35.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 40.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
340,577 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 37.25 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
5 years 2 months 9 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
340,577 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 37.25 |
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Range of Exercise Prices $40.01 - $45.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 40.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 45.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
400,084 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 43.56 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
1 year 9 months 22 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
400,084 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 43.56 |
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Range of Exercise Prices $45.01 - $50.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 45.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 50.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
1,185,747 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 48.62 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
2 years 8 months 19 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
1,185,747 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 48.62 |
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Range of Exercise Prices $50.01 - $55.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 50.01 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 55.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
334,532 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 50.85 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
1 year 3 months 11 days |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
334,532 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 50.85 |
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Range of Exercise Prices $10.00 - $50.00 [Member]
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |
$ 10.00 |
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| Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |
$ 55.00 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Number |
3,429,804 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price |
$ 38.93 |
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| Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term |
4 years 5 months 1 day |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Number |
2,944,739 |
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| Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price |
$ 40.79 |
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