Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2010

Employee Benefit Plans [Abstract]

Stock-Based Compensation Expense

	2010			2009			2008
	(in thousands)
Stock-based compensation expense by type:
Stock options	$	21,757		$	19,555		$	18,202
Restricted stock awards		41,190			46,315			37,167
Total stock-based compensation expense		62,947			65,870			55,369
Tax benefit recognized		(23,057	)		(24,128	)		(20,282	)
Stock-based compensation expense, net of tax	$	39,890		$	41,742		$	35,087

Weighted-Average Fair Value Of Stock Options

	2010			2009			2008
Weighted-average fair value at grant date	$	19.58		$	14.24		$	17.95
Expected option life (years)		5.2			4.6			5.1
Expected volatility		43.8	%		39.2	%		28.2	%
Risk-free interest rate at grant date		2.7	%		1.9	%		2.9	%
Dividend yield		None			None			None

Activity For Option Plans

	Shares Under Option			Weighted-Average Exercise Price
Options outstanding at December 31, 2009		6,058,321		$	46.10
Granted		639,989			46.12
Exercised		(565,500	)		30.91
Expired		(250,545	)		62.10
Forfeited		(87,293	)		48.24
Options outstanding at December 31, 2010		5,794,972		$	46.86
Options exercisable at December 31, 2010		3,625,225		$	47.46

Activity for Restricted Stock Awards

	Shares			Weighted- Average Grant-Date Fair Value
Nonvested restricted stock awards at December 31, 2009		2,345,555		$	55.11
Granted		901,660			49.29
Vested		(634,202	)		62.18
Forfeited		(150,154	)		51.35
Expired		(3,899	)		59.66
Nonvested restricted stock awards at December 31, 2010		2,458,960		$	51.38