CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
OPERATING ACTIVITIES
Net income	$ 335	$ 396
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,088	2,200
Impairment of assets	8	32
Deferred income taxes	53	208
Provision for uncollectible accounts	84	63
Net long-term debt premium amortization	(8)	(21)
Share-based compensation	38	42
Changes in current assets and liabilities:
Accounts receivable	(51)	(72)
Accounts payable	(112)	75
Accrued income and other taxes	120	(11)
Other current assets and liabilities, net	(50)	(356)
Retirement benefits	(19)	(102)
Changes in other noncurrent assets and liabilities, net	(11)	66
Other, net	6	(11)
Net cash provided by operating activities	2,481	2,509
INVESTING ACTIVITIES
Payments for property, plant and equipment and capitalized software	(1,272)	(1,401)
Proceeds from sale of intangible assets or property	26	0
Other, net	(12)	(18)
Net cash used in investing activities	(1,258)	(1,419)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	594	0
Payments of long-term debt	(506)	(121)
Net (payments) borrowings on credit facility and revolving line of credit	(405)	120
Dividends paid	(609)	(616)
Net proceeds from issuance of common stock	9	32
Repurchase of common stock	(277)	(493)
Other, net	(2)	1
Net cash used in financing activities	(1,196)	(1,077)
Net increase in cash and cash equivalents	27	13
Cash and cash equivalents at beginning of period	128	168
Cash and cash equivalents at end of period	155	181
Supplemental cash flow information:
Income taxes paid, net	(41)	(23)
Interest paid (net of capitalized interest of $29 and $22)	$ (654)	$ (672)