Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue:
Services	$ 5,670	$ 4,727	$ 11,094	$ 8,918
Product sales	1,564	1,208	3,008	2,299
Total revenue	7,234	5,935	14,102	11,217
Operating costs and expenses:
Cost of services	4,638	3,659	9,171	7,087
Cost of sales	1,328	1,050	2,572	2,020
General and administrative	67	65	135	135
Total operating costs and expenses	6,033	4,774	11,878	9,242
Operating income	1,201	1,161	2,224	1,975
Interest expense, net of interest income of $2, $2, $4, and $3	(80)	(63)	(154)	(132)
Other, net	(17)	(5)	(24)	(9)
Income from continuing operations before income taxes	1,104	1,093	2,046	1,834
Provision for income taxes	(357)	(352)	(661)	(581)
Income from continuing operations	747	741	1,385	1,253
Income (loss) from discontinued operations, net of income tax (provision) benefit of $(3), $1, $2, and $1	(8)	0	(16)	(1)
Net income	739	741	1,369	1,252
Noncontrolling interest in net income of subsidiaries	(2)	(2)	(5)	(2)
Net income attributable to company	737	739	1,364	1,250
Amounts attributable to company shareholders:
Income from continuing operations	745	739	1,380	1,251
Loss from discontinued operations, net	(8)	0	(16)	(1)
Net income attributable to company	$ 737	$ 739	$ 1,364	$ 1,250
Basic income per share attributable to company shareholders:
Income from continuing operations (in dollars per share)	$ 0.81	$ 0.81	$ 1.50	$ 1.37
Loss from discontinued operations, net (in dollars per share)	$ (0.01)	$ 0.00	$ (0.02)	$ 0.00
Net income per share (in dollars per share)	$ 0.80	$ 0.81	$ 1.48	$ 1.37
Diluted income per share attributable to company shareholders:
Income from continuing operations (in dollars per share)	$ 0.80	$ 0.80	$ 1.49	$ 1.36
Loss from discontinued operations, net (in dollars per share)	$ (0.01)	$ 0.00	$ (0.02)	$ 0.00
Net income per share (in dollars per share)	$ 0.79	$ 0.80	$ 1.47	$ 1.36
Cash dividends per share (in dollars per share)	$ 0.09	$ 0.09	$ 0.18	$ 0.18
Basic weighted average common shares outstanding (in shares)	924	916	923	915
Diluted weighted average common shares outstanding (in shares)	926	921	926	920