CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash Flows From Operating Activities:
Net Income	$ 184	$ 180
Adjustments to reconcile net income to net cash provided from operating activities:
Earnings from equity method investments, net of distributions	1	(1)
Deferred income taxes, net	45	116
Depreciation and amortization	173	174
Amortization of nuclear fuel	14	18
Allowance for equity funds used during construction	(8)	(10)
Carrying cost recovery		(3)
Cash provided (used) by changes in certain assets and liabilities:
Receivables	210	100
Inventories	8	30
Prepayments and other	57	(19)
Regulatory liabilities	(6)	(3)
Accounts payable	(93)	(53)
Taxes accrued	(63)	(134)
Interest accrued	2	1
Regulatory assets	(28)	(90)
Changes in other assets	(12)	(8)
Changes in other liabilities	(59)	62
Net Cash Provided From Operating Activities	425	360
Cash Flows From Investing Activities:
Utility property additions and construction expenditures	(466)	(432)
Proceeds from investments	10	8
Nonutility property additions	(11)	(15)
Purchase of investments	(13)	(22)
Settlements of interest rate contracts	(61)
Net Cash Used For Investing Activities	(541)	(461)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock	50	106
Proceeds from issuance of long-term debt	796	203
Repayment of long-term debt	(623)	(67)
Dividends	(122)	(117)
Short-term borrowings, net	126	(104)
Net Cash Provided From (Used For) Financing Activities	227	21
Net Increase (Decrease) In Cash and Cash Equivalents	111	(80)
Cash and Cash Equivalents, January 1	55	162
Cash and Cash Equivalents, June 30	166	82
Supplemental Cash Flow Information:
Cash paid for - Interest (net of capitalized interest of $5 and $5)	134	132
Cash paid for - Income taxes		55
Noncash Investing and Financing Activities:
Accrued construction expenditures	125	95
Capital leases	$ 2	$ 6