Statement of Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Statement of Income [Abstract]
Operating Revenues	$ 4,614,914	$ 3,928,056	$ 8,886,759	$ 7,560,820
Cost of revenues	2,996,014	2,514,222	5,758,023	4,842,085
Selling, administrative, and research and development expenses	845,145	735,847	1,641,145	1,463,491
Amortization of intangible assets	62,705	51,952	117,949	103,534
Operating Income	711,050	626,035	1,369,642	1,151,710
Interest expense	(45,396)	(43,269)	(89,378)	(87,564)
Other income (expense)	15,357	2,207	21,252	6,085
Income from Continuing Operations Before Income Taxes	681,011	584,973	1,301,516	1,070,231
Income Taxes	197,482	185,181	211,750	349,143
Income from Continuing Operations	483,529	399,792	1,089,766	721,088
Income from discontinued operations	14,901	11,664	31,804	24,173
Total	$ 498,430	$ 411,456	$ 1,121,570	$ 745,261
Income Per Share from Continuing Operations:
Basic	$ 0.97	$ 0.79	$ 2.19	$ 1.43
Diluted	$ 0.96	$ 0.79	$ 2.17	$ 1.43
Income Per Share from Discontinued Operations:
Basic	$ 0.03	$ 0.02	$ 0.06	$ 0.05
Diluted	$ 0.03	$ 0.02	$ 0.06	$ 0.05
Net Income Per Share:
Basic	$ 1.00	$ 0.82	$ 2.25	$ 1.48
Diluted	$ 0.99	$ 0.81	$ 2.23	$ 1.47
Cash Dividends:
Paid	$ 0.34	$ 0.31	$ 0.68	$ 0.62
Declared	$ 0.34	$ 0.31	$ 0.68	$ 0.62
Shares of Common Stock Outstanding During the Period:
Average	497,798	503,265	498,178	502,847
Average assuming dilution	501,861	506,297	502,300	505,479