Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities
Net income	$ 882	$ 649
Reconciliation of net income to net cash provided by operating activities:
Depreciation	428	411
Deferred income taxes	243	46
Gains and losses on properties and investments	0	(3)
Changes in assets and liabilities affecting operations:
Accounts receivable	(184)	(126)
Materials and supplies	(32)	(15)
Other current assets	36	36
Current liabilities other than debt	221	236
Other, net	106	148
Net cash provided by operating activities	1,700	1,382
Cash flows from investing activities
Property additions	(888)	(569)
Property sales and other transactions	20	21
Investments, including short-term	(67)	(260)
Investment sales and other transactions	134	77
Net cash used in investing activities	(801)	(731)
Cash flows from financing activities
Dividends	(283)	(252)
Common stock issued, net	69	42
Purchase and retirement of common stock	(792)	(114)
Proceeds from borrowings - net	396
Debt repayments	(438)	(468)
Net cash used in financing activities	(1,048)	(792)
Net decrease in cash and cash equivalents	(149)	(141)
Cash and cash equivalents
At beginning of year	827	996
At end of period	678	855
Supplemental disclosure of cash flow information
Interest (net of amounts capitalized)	219	232
Income taxes (net of refunds)	$ 45	$ 253

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The net cash inflow or outflow from financing activity for the period.

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