Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue:
Services	$ 5,521	$ 5,246	$ 16,615	$ 14,164
Product sales	1,590	1,302	4,598	3,601
Total revenue	7,111	6,548	21,213	17,765
Operating costs and expenses:
Cost of services	4,751	4,030	13,922	11,117
Cost of sales	1,339	1,107	3,911	3,127
General and administrative	67	79	202	214
Total operating costs and expenses	6,157	5,216	18,035	14,458
Operating income	954	1,332	3,178	3,307
Interest expense, net of interest income of $1, $1, $5, and $4	(71)	(62)	(225)	(194)
Other, net	(6)	(9)	(30)	(18)
Income from continuing operations before income taxes	877	1,261	2,923	3,095
Provision for income taxes	(267)	(411)	(928)	(992)
Income from continuing operations	610	850	1,995	2,103
Loss from discontinued operations, net of income tax (provision) benefit of $1, $(19), $2, and $(18)	(6)	(165)	(22)	(166)
Net income	604	685	1,973	1,937
Noncontrolling interest in net income of subsidiaries	(2)	(2)	(7)	(4)
Net income attributable to company	602	683	1,966	1,933
Amounts attributable to company shareholders:
Income from continuing operations	608	848	1,988	2,099
Loss from discontinued operations, net	(6)	(165)	(22)	(166)
Net income attributable to company	$ 602	$ 683	$ 1,966	$ 1,933
Basic income per share attributable to company shareholders:
Income from continuing operations (in dollars per share)	$ 0.66	$ 0.92	$ 2.15	$ 2.29
Loss from discontinued operations, net (in dollars per share)	$ (0.01)	$ (0.18)	$ (0.02)	$ (0.18)
Net income per share (in dollars per share)	$ 0.65	$ 0.74	$ 2.13	$ 2.11
Diluted income per share attributable to company shareholders:
Income from continuing operations (in dollars per share)	$ 0.65	$ 0.92	$ 2.14	$ 2.28
Loss from discontinued operations, net (in dollars per share)	$ 0.00	$ (0.18)	$ (0.02)	$ (0.18)
Net income per share (in dollars per share)	$ 0.65	$ 0.74	$ 2.12	$ 2.10
Cash dividends per share (in dollars per share)	$ 0.09	$ 0.09	$ 0.27	$ 0.27
Basic weighted average common shares outstanding (in shares)	928	920	925	917
Diluted weighted average common shares outstanding (in shares)	930	925	927	922