Employee benefit plans and stock-based compensation plans (reflecting the two for one stock split effective June, 8 2010) (Tables)

12 Months Ended

Dec. 31, 2011

Employee benefit plans and stock-based compensation plans (reflecting the two-for-one stock split effective June 8, 2010)

Status of restricted stock and performance shares

	2011
(share data in millions)	Shares			Weighted- Average  Grant Date Fair Value
Outstanding at beginning of year		1.0		$	31.95
Granted		0.8			48.72
Other(1)		0.2			55.68
Released		(0.7	)		28.77
Forfeited/Cancelled		—
Outstanding at end of period		1.3		$	41.92

⁽¹⁾ Represents additional performance shares issued above the original value for exceeding certain performance metrics

Status of stock options and SSRs

	2011
(share data in millions)	Shares			Weighted-Average Exercise Price
Outstanding at beginning of year		13.3		$	27.83
Granted		3.3			52.97
Exercised		(2.4	)		21.91
Forfeited/cancelled		(0.5	)		40.56
Outstanding at end of period		13.7		$	34.54
Awards exercisable at period end		7.9		$	26.36

Weighted average assumptions to value options and SSRs granted

	2011	2010	2009
Expected life of option	2-5 years	3-5 years	3-5 years
Risk-free interest rate	0.3%-2.2%	0.5%-2.4%	1.3%-2.4%
Expected volatility of stock	30%-39%	36%-41%	35%-39%
Expected dividend yield	None	None	None
Weighted average volatility of stock	36.6%	38.4%	37.5%

Total stock option exercised and restricted shares vested

(in millions, except per share data)	2011		2010		2009
Proceeds from stock options exercised	$	35.9	$	38.2	$	9.4
Intrinsic value of stock options exercised		82.8		123.7		48.8
Weighted average fair value of options granted during the year	$	14.74	$	15.97	$	7.27