Consolidated Statements of Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue:
Revenues	$ 20,705	$ 23,838	$ 22,877
Costs and expenses:
Selling, general and administrative	2,404	2,832	2,699
Goodwill impairment	14,717	0	0
Other Restructuring Costs	1,866	342	433
Separation and merger related	134	184	153
Operating Costs and Expenses	36,627	22,764	22,176
Operating income (loss)	(15,922)	1,074	701
Other non-operating income (loss), net	1,040	(84)	202
Interest expense, net	(264)	(237)	(223)
Income (loss) before income taxes and equity in loss of affiliate	(15,146)	753	680
Equity in loss of affiliate	0	0	(139)
Provision for income taxes	(650)	(476)	(402)
Net income (loss)	(15,796)	277	139
Less: Net income attributable to noncontrolling interests	29	36	19
Less: Net income attributable to noncontrolling interests	$ (15,825)	$ 241	$ 120
Class A
Costs and expenses:
Dividends per share (in dollars per share)	$ 0.72	$ 0.72	$ 0.72
Sales of goods
Revenue:
Revenues	$ 12,846	$ 13,689	$ 13,113
Costs and expenses:
Cost	11,383	11,798	11,524
Sales of services
Revenue:
Revenues	7,859	10,149	9,764
Costs and expenses:
Cost	$ 6,123	$ 7,608	$ 7,367