CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 700	$ 551
Restricted cash and securities	5	5
Accounts receivable, less allowance of $160 and $164	2,471	2,557
Assets held for sale	15	140
Other	1,260	941
Total current assets	4,451	4,194
Property, plant and equipment, net of accumulated depreciation of $25,872 and $24,352	26,494	26,852
GOODWILL AND OTHER ASSETS
Goodwill	30,715	30,475
Restricted cash and securities	27	31
Other intangibles, net	1,869	1,897
Other, net	1,123	1,286
Total goodwill and other assets	43,401	44,565
TOTAL ASSETS	74,346	75,611
CURRENT LIABILITIES
Current maturities of long-term debt	437	443
Accounts payable	1,360	1,555
Accrued expenses and other liabilities
Salaries and benefits	929	890
Income and other taxes	344	370
Interest	343	363
Other	358	344
Current portion of deferred revenue	750	892
Total current liabilities	4,521	4,857
LONG-TERM DEBT	36,878	37,283
DEFERRED CREDITS AND OTHER LIABILITIES
Deferred income taxes, net	2,407	2,413
Benefit plan obligations, net	4,884	5,178
Other	2,667	2,389
Total deferred credits and other liabilities	9,958	9,980
COMMITMENTS AND CONTINGENCIES (Note 12)
STOCKHOLDERS' EQUITY
Preferred stock—non-redeemable, $25 par value, authorized 2,000 and 2,000 shares, issued and outstanding 7 and 7 shares	0	0
Common stock, $1.00 par value, authorized 1,600,000 and 1,600,000 shares, issued and outstanding 1,078,705 and 1,069,169 shares	1,079	1,069
Additional paid-in capital	23,360	23,314
Accumulated other comprehensive loss	(2,490)	(1,995)
Retained earnings	1,040	1,103
Total stockholders' equity	22,989	23,491
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	74,346	75,611
Customer relationships
GOODWILL AND OTHER ASSETS
Customer relationships, net	$ 9,667	$ 10,876