CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES
Net income	$ 567	$ 274
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,240	2,416
Deferred income taxes	307	137
Provision for uncollectible accounts	65	103
Gain on sale of intangible assets	(32)
Long-term debt premium amortization	(32)	(49)
Net loss on early retirement of debt		194
Changes in current assets and current liabilities:
Accounts receivable	(48)	(64)
Accounts payable	123	(140)
Accrued income and other taxes	(11)	22
Other current assets and other current liabilities, net	(163)	(6)
Retirement benefits	(220)	(163)
Changes in other noncurrent assets and liabilities, net	48	53
Other, net	12	22
Net cash provided by operating activities	2,856	2,799
INVESTING ACTIVITIES
Payments for property, plant and equipment and capitalized software	(1,410)	(1,305)
Proceeds from sale of intangible assets or property	75	133
Other, net	23	(3)
Net cash used in investing activities	(1,312)	(1,175)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	1,740	3,361
Payments of long-term debt	(1,018)	(3,630)
Early retirement of debt costs		(324)
Net payments on credit facility	(775)	(27)
Dividends paid	(661)	(905)
Net proceeds from issuance of common stock	40	65
Repurchase of common stock	(867)	(20)
Other, net		7
Net cash used in financing activities	(1,541)	(1,473)
Effect of exchange rate changes on cash and cash equivalents		2
Net increase in cash and cash equivalents	3	153
Cash and cash equivalents at beginning of period	211	128
Cash and cash equivalents at end of period	214	281
Supplemental cash flow information:
Income taxes (paid), net	(46)	(31)
Interest (paid) (net of capitalized interest of $18 and $21)	$ (647)	$ (729)