Changes in Equity and Noncontrolling Interests (Details) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			$ 2,880,072	$ 2,442,182
Balance at beginning of period			(54,951)
Net income	184,160	161,389	520,379	469,870
Other comprehensive income			(42,335)	(3,678)
Payments to shareholders of noncontrolling interests			(3,620)	(4,371)
Purchase of noncontrolling interest			(8)
Purchase of treasury stock			(400,801)	(296,975)
Stock options exercised, including tax benefit			116,515	98,009
Dividends declared			(101,924)	(65,101)
Stock-based compensation expense			29,382	26,584
Balance at end of period	2,997,660	2,666,520	2,997,660	2,666,520
Balance at end of period	(97,094)		(97,094)
Common Stock
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period (in shares)			316	320
Balance at beginning of period			316	320
Retirement of treasury stock			(8)	(8)
Retirement of treasury stock (in shares)			(8)	(8)
Stock options exercised, including tax benefit			4	4
Stock options exercised, including tax benefit (in shares)			4	4
Balance at end of period (in shares)	312	316	312	316
Balance at end of period	312	316	312	316
Additional Paid in Capital
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			489,768	336,523
Purchase of noncontrolling interest				662
Stock options exercised, including tax benefit			116,511	98,005
Stock-based compensation expense			29,382	26,584
Balance at end of period	635,661	461,774	635,661	461,774
Retained Earnings
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			2,424,376	2,210,120
Net income			515,622	467,793
Retirement of treasury stock			(400,793)	(296,967)
Dividends declared			(101,924)	(65,101)
Balance at end of period	2,437,281	2,315,845	2,437,281	2,315,845
Accumulated Other Comprehensive Loss
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			(54,951)	(117,004)
Other comprehensive income			(42,143)	(3,970)
Purchase of noncontrolling interest				288
Balance at end of period	(97,094)	(120,686)	(97,094)	(120,686)
Treasury Stock
Increase (Decrease) In Shareholders' Equity
Purchase of treasury stock			(400,801)	(296,975)
Retirement of treasury stock			400,801	296,975
Noncontrolling Interests
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			20,563	12,223
Net income			4,757	2,077
Other comprehensive income			(192)	292
Payments to shareholders of noncontrolling interests			(3,620)	(4,371)
Purchase of noncontrolling interest			(8)	(950)
Balance at end of period	$ 21,500	$ 9,271	$ 21,500	$ 9,271