Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation Plans [Abstract]

Stock option and SARs activities

	Shares			Weighted Average Exercise Price
Outstanding at December 31, 2011		4,558,609		$	41.47
Granted		754,471			64.14
Exercised		(1,218,780	)		21.90
Expired/forfeited		(6,196	)		48.31
Outstanding at June 30, 2012		4,088,104		$	51.48

Weighted average grant date fair value of SARs

	Six Months Ended June 30, 2012
Weighted average exercise price per share	$	64.14
Expected annual dividends per share		0.25	%
Expected life in years		3.7
Expected volatility		45	%
Risk-free interest rate		0.4	%
Weighted average grant date fair value	$	21.32

Non-vested restricted stock outstanding

	Equity Awards					Liability Awards
	Shares			Weighted Average Grant Date Fair Value		Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2011		221,609		$	49.64		487,244		$	48.76
Granted		359,732			63.37		370,059			63.89
Vested		(85,294	)		56.87		(227,844	)		50.51
Forfeited		(14,307	)		57.56		(1,717	)		51.39
Outstanding at June 30, 2012		481,740		$	58.37		627,742		$	57.04