CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock, at Cost	Non-controlling Interests
Balance, value at Dec. 31, 2011	$ 3,714,999	$ 2,146	$ 2,347,518	$ 4,263,599	$ (8,067)	$ (2,912,324)	$ 22,127
Balance, shares at Dec. 31, 2011		157,420
Net income	526,526			499,905			26,621
Other comprehensive income (loss), net of tax	22,035				22,035
Dividends declared	(81,239)			(81,239)
Distributions to noncontrolling interests	(24,112)						(24,112)
Issuance of common stock under benefit plans, value	15,663	8	2,457			13,198
Issuance of common stock under benefit plans, shares		1,112
Stock-based compensation expense	43,087		40,322			2,765
Exercise of stock options, value	143,945		(13,809)			157,754
Exercise of stock options, shares		3,090
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, value	(19,859)	(3)	(19,856)
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, shares		(344)
Tax benefits associated with stock-based compensation plans	4,845		4,845
Purchases of treasury stock, value	(149,996)					(149,996)
Purchases of treasury stock, shares		(2,561)
Other	1,687						1,687
Balance, value at Sep. 30, 2012	4,197,581	2,151	2,361,477	4,682,265	13,968	(2,888,603)	26,323
Balance, shares at Sep. 30, 2012		158,717
Balance, value at Dec. 31, 2012	4,185,729	2,151	2,370,677	4,690,378	14,320	(2,914,479)	22,682
Balance, shares at Dec. 31, 2012		158,331
Net income	732,107			706,390			25,717
Other comprehensive income (loss), net of tax	(22,308)				(22,308)
Dividends declared	(137,103)			(137,103)
Distributions to noncontrolling interests	(21,381)						(21,381)
Issuance of common stock under benefit plans, value	15,591	5	1,992			13,594
Issuance of common stock under benefit plans, shares		781
Stock-based compensation expense	24,107		21,355			2,752
Exercise of stock options, value	98,057		(6,602)			104,652	7
Exercise of stock options, shares		2,006
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, value	(10,085)	(2)	(10,083)
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, shares		(176)
Tax benefits associated with stock-based compensation plans	(906)		(906)
Purchases of treasury stock, value	(994,102)		(70,000)			(924,102)
Purchases of treasury stock, shares		(15,550)
Other	1,889						1,889
Balance, value at Sep. 30, 2013	$ 3,871,595	$ 2,154	$ 2,306,433	$ 5,259,665	$ (7,988)	$ (3,717,583)	$ 28,914
Balance, shares at Sep. 30, 2013		145,392