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Employee Share-Based Incentive Compensation Plans (WTM Non-Qualified Options) (Details) (Non-Qualified Options, USD $)
In Millions, except Share data, unless otherwise specified |
1 Months Ended | 9 Months Ended | ||
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Jan. 31, 2007
Before Amendments [Member]
Year
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May 31, 2010
Grant Amendments [Member]
Year
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Sep. 30, 2012
Grant Amendments [Member]
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May 26, 2010
Grant Amendments [Member]
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| Share-based compensation arrangement by share-based payment award | ||||
| Granted (in shares) | 200,000 | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date | 7 | |||
| Vesting period (in years) | 5 years | |||
| Initial exercise price (in dollars per share) | $ 650.00 | |||
| Annual percentage increase in exercise price | 5.00% | |||
| Extension of contractual term (in years) | 3 | |||
| Exercise price (in dollar per share) | $ 742 | |||
| Number of shares extinguished | 75,000 | |||
| Threshold for in-the-money potential | $ 100.0 | |||
| Limit on value of in-the-money options over $100 million (as a percent) | 50.00% | |||
| Expense recognized | $ 0.1 | |||
| X | ||||||||||
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Years the equity-based award expires. No definition available.
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- Definition
Percentage used to determine annual increase in exercise price of options. No definition available.
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- Definition
This element represents the extension (in number of years) to exercise the options. No definition available.
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- Definition
This element represents the number of non-qualified options that were extinguished as part of the option award amendment. No definition available.
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- Definition
This element represents the initial exercise price per option to purchase common shares. No definition available.
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- Definition
The percentage limit of in-the-money potential value above $100 million. No definition available.
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- Definition
The amount of in-the-money potential above which a 50% limit is imposed. No definition available.
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- Definition
This element represents the amended exercise price (which is frozen at $742) for the non-qualified options. No definition available.
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