CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities:
Net income	$ 289	$ 281
Adjustments to reconcile net income to net cash provided from operating activities:
Earnings from equity method investments, net of distributions	1	2
Deferred income taxes, net	97	149
Depreciation and amortization	263	254
Amortization of nuclear fuel	27	27
Allowance for equity funds used during construction	(13)	(17)
Carrying cost recovery		(3)
Cash provided (used) by changes in certain assets and liabilities:
Receivables	175	53
Inventories	2	31
Prepayments and other	68	(115)
Regulatory liabilities	(12)	(7)
Accounts payable	(108)	(33)
Taxes accrued	(21)	(15)
Interest accrued	(1)	1
Regulatory assets	(88)	(86)
Changes in other assets	(10)	(15)
Changes in other liabilities	8	140
Net Cash Provided From Operating Activities	677	647
Cash Flows From Investing Activities:
Utility property additions and construction expenditures	(699)	(601)
Proceeds from investments (including derivative collateral posted)	16	10
Nonutility property additions	(16)	(22)
Purchase of investments (including derivative collateral posted)	(116)	(94)
Settlements of interest rate contracts	(61)
Net Cash Used For Investing Activities	(876)	(707)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock	73	124
Proceeds from issuance of long-term debt	796	271
Repayment of long-term debt	(627)	(293)
Dividends	(185)	(177)
Short-term borrowings, net	161
Net Cash Provided From Financing Activities	218	(75)
Net Increase (Decrease) In Cash and Cash Equivalents	19	(135)
Cash and Cash Equivalents, January 1	55	162
Cash and Cash Equivalents, September 30	74	27
Supplemental Cash Flow Information:
Cash paid for - Interest (net of capitalized interest of $7 and $8)	206	196
Cash paid for - Income taxes		55
Noncash Investing and Financing Activities:
Accrued construction expenditures	62	161
Capital leases	$ 2	$ 6