Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 68	$ 64
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	135	130
Allowance for equity funds	0	(4)
Deferred income taxes and amortization of investment tax credits	39	35
Amortization of other regulatory assets	66	(3)
Other, net	21	14
Changes in other operating assets and liabilities:
Accounts receivable and other assets	(201)	(138)
Inventories	1	0
Accounts payable and other liabilities	19	32
Net cash flows from operating activities	148	130
Cash flows from investing activities:
Capital expenditures	(97)	(107)
Net cash flows from investing activities	(97)	(107)
Cash flows from financing activities:
Repayment of long-term debt	(9)	(2)
Dividends paid	0	(80)
Net cash flows from financing activities	(9)	(82)
Net change in cash and cash equivalents	42	(59)
Cash and cash equivalents at beginning of period	126	201
Cash and cash equivalents at end of period	$ 168	$ 142