CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 1,564	$ 1,690
Restricted cash - current	3	3
Accounts receivable, less allowance of $99 and $106	2,175	2,259
Assets held for sale	7	8
Other	941	808
Total current assets	4,690	4,768
Property, plant and equipment, net of accumulated depreciation of $29,814 and $29,346	25,956	26,079
GOODWILL AND OTHER ASSETS
Goodwill	21,473	21,534
Operating lease assets	1,667	1,686
Restricted cash	24	24
Customer relationships, net	7,245	7,596
Other intangible assets, net	1,981	1,971
Other, net	1,020	1,084
Total goodwill and other assets	33,410	33,895
TOTAL ASSETS	64,056	64,742
CURRENT LIABILITIES
Current maturities of long-term debt	1,129	2,300
Accounts payable	1,581	1,724
Accrued expenses and other liabilities
Salaries and benefits	729	1,037
Income and other taxes	354	311
Current operating lease liabilities	416	416
Interest	337	280
Other	369	386
Current portion of deferred revenue	788	804
Total current liabilities	5,703	7,258
LONG-TERM DEBT	33,481	32,394
DEFERRED CREDITS AND OTHER LIABILITIES
Deferred income taxes, net	2,957	2,918
Benefit plan obligations, net	4,516	4,594
Noncurrent operating lease liabilities	1,316	1,342
Other	2,792	2,766
Total deferred credits and other liabilities	11,581	11,620
COMMITMENTS AND CONTINGENCIES (Note 12)
STOCKHOLDERS' EQUITY
Preferred stock—non-redeemable, $25.00 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 2,200,000 and 2,200,000 shares, issued and outstanding 1,097,711 and 1,090,058 shares	1,098	1,090
Additional paid-in capital	21,634	21,874
Accumulated other comprehensive loss	(2,955)	(2,680)
Accumulated deficit	(6,486)	(6,814)
Total stockholders' equity	13,291	13,470
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 64,056	$ 64,742