Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Services	$ 3,702	$ 2,640	$ 6,853	$ 5,625
Product sales	1,255	1,195	2,383	2,408
Total revenue	4,957	3,835	9,236	8,033
Operating costs and expenses:
Cost of services	3,453	2,777	6,556	5,733
Cost of sales	1,021	955	1,939	1,924
Impairments and other charges	262	423	262	3,189
General and administrative	75	41	130	89
Merger-related costs and termination fee	0	3,519	0	4,057
Total operating costs and expenses	4,811	7,715	8,887	14,992
Operating income (loss)	146	(3,880)	349	(6,959)
Interest expense, net of interest income	(121)	(196)	(363)	(361)
Other, net	(26)	(31)	(44)	(78)
Income (loss) from continuing operations before income taxes	(1)	(4,107)	(58)	(7,398)
Income tax benefit (provision)	29	902	54	1,777
Income (loss) from continuing operations	28	(3,205)	(4)	(5,621)
Income (loss) from discontinued operations, net	0	0	0	(2)
Net income (loss)	28	(3,205)	(4)	(5,623)
Net (income) loss attributable to noncontrolling interest	0	(3)	0	3
Net income (loss) attributable to company	28	(3,208)	(4)	(5,620)
Amounts attributable to company shareholders:
Income (loss) from continuing operations	28	(3,208)	(4)	(5,618)
Income (loss) from discontinued operations, net	0	0	0	(2)
Net income (loss) attributable to company	$ 28	$ (3,208)	$ (4)	$ (5,620)
Basic and diluted net income (loss) per share	$ 0.03	$ (3.73)	$ 0.00	$ (6.54)
Basic weighted average common shares outstanding (in shares)	869	860	868	859
Diluted weighted average common shares outstanding (in shares)	871	860	868	859
Cash dividends per share	$ 0.18	$ 0.18	$ 0.36	$ 0.36