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Share-based compensation (Details) In Millions, unless otherwise specified	Sep. 30, 2012
Equity and Incentive Plan (EIP)
Share-based compensation
Aggregate shares of issuance of common stock approved by shareholders	4
Shares remaining available for future issuance	3.8
Shares that can be issued upon vesting of outstanding units and achievement of performance goals	1.7
Stock Option and Incentive Plan (SOIP)
Share-based compensation
Outstanding shares	0.5

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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