Stock-based compensation plans (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Restricted Stock and Restricted Stock Unit Activity

A summary of restricted stock and restricted stock unit activity follows:


	Restricted Stock Units Outstanding			Weighted- Average Grant Price		Restricted Stock Outstanding			Weighted- Average Grant Price
Unvested at January 1, 2012		801,463		$	61.31		1,091,365		$	63.45
Granted		278,505			79.50		453,908			81.45
Vested		(276,308	)		53.57		(408,232	)		62.27
Cancelled		(4,165	)		70.00		(41,410	)		72.20

Unvested at December 31, 2012		799,495		$	70.28		1,095,631		$	71.01

Summary of Stock Option Activity

A summary of stock option activity follows:


	Stock Options Outstanding			Weighted-Average				Aggregate Intrinsic Value (In thousands)
	Stock Options Outstanding			Exercise Price		Life (In Years)		Aggregate Intrinsic Value (In thousands)
Outstanding at January 1, 2012		9,839,948		$	98.37
Granted		100			79.74
Exercised		(2,432,316	)		82.65
Cancelled		(1,814	)		94.76
Expired		(372,559	)		107.93

Outstanding at December 31, 2012		7,033,359		$	103.30		3.4	$	26,212

Exercisable at December 31, 2012		7,007,472		$	103.53		3.4	$	24,761

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

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