CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 3,418	$ 3,476
Marketable securities	1,043	1,091
Accounts receivable, net	6,937	7,695
Other current assets	1,512	1,587
Total Current Assets	12,910	13,849
Property, Plant and Equipment, Net	20,988	18,800
Goodwill	3,838	3,757
Intangible Assets, Net	1,897	1,758
Non-Current Investments and Restricted Cash	481	476
Deferred Income Tax Assets	318	591
Other Non-Current Assets	924	1,146
Total Assets	41,356	40,377
Current Liabilities:
Current maturities of long-term debt and commercial paper	4,555	3,681
Accounts payable	2,808	3,042
Accrued wages and withholdings	2,439	2,317
Hedge margin liabilities	48	575
Self-insurance reserves	713	670
Accrued group welfare and retirement plan contributions	640	598
Other current liabilities	964	847
Total Current Liabilities	12,167	11,730
Long-Term Debt	14,355	12,394
Pension and Postretirement Benefit Obligations	10,075	12,694
Deferred Income Tax Liabilities	75	112
Self-Insurance Reserves	1,740	1,794
Other Non-Current Liabilities	1,405	1,224
Shareowners' Equity:
Additional paid-in capital	0	0
Retained earnings	5,724	4,879
Accumulated other comprehensive loss	(4,224)	(4,483)
Deferred compensation obligations	37	45
Less: Treasury stock (1 share in 2017 and 2016)	(37)	(45)
Total Equity for Controlling Interests	1,509	405
Noncontrolling Interests	30	24
Total Shareowners’ Equity	1,539	429
Total Liabilities and Shareowners’ Equity	41,356	40,377
Common Class A [Member]
Shareowners' Equity:
Common stock	2	2
Total Equity for Controlling Interests	2	2
Common Class B [Member]
Shareowners' Equity:
Common stock	7	7
Total Equity for Controlling Interests	$ 7	$ 7