CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 476	$ 211
Accounts receivable, less allowance of $146 and $158	1,924	1,917
Income tax receivable	5	42
Deferred income taxes, net	883	891
Other	587	552
Total current assets	3,875	3,613
NET PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	32,571	32,086
Accumulated depreciation	(13,746)	(13,054)
Net property, plant and equipment	18,825	19,032
GOODWILL AND OTHER ASSETS
Goodwill	21,733	21,732
Customer relationships, less accumulated amortization of $2,811 and $2,524	6,765	7,052
Other intangible assets, less accumulated amortization of $1,022 and $956	1,731	1,795
Other	800	796
Total goodwill and other assets	31,029	31,375
TOTAL ASSETS	53,729	54,020
CURRENT LIABILITIES
Current maturities of long-term debt	1,193	1,205
Accounts payable	1,094	1,207
Accrued expenses and other liabilities
Salaries and benefits	601	683
Income and other taxes	398	356
Interest	334	268
Other	274	234
Advance billings and customer deposits	689	642
Total current liabilities	4,583	4,595
LONG-TERM DEBT	19,595	19,400
DEFERRED CREDITS AND OTHER LIABILITIES
Deferred income taxes, net	3,812	3,644
Benefit plan obligations, net	5,640	5,844
Other	1,243	1,248
Total deferred credits and other liabilities	10,695	10,736
COMMITMENTS AND CONTINGENCIES (Note 9)
STOCKHOLDERS' EQUITY
Preferred stock-non-redeemable, $25.00 par value, authorized 2,000 shares, issued and outstanding 7 and 7 shares
Common stock, $1.00 par value, authorized 1,600,000 and 1,600,000 shares, respectively, issued and outstanding 615,564 and 625,658 shares	616	626
Additional paid-in capital	18,691	19,079
Accumulated other comprehensive (loss) income	(1,695)	(1,701)
Retained earnings	1,244	1,285
Total stockholders' equity	18,856	19,289
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 53,729	$ 54,020