CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
OPERATING REVENUES
Operating revenues	$ 1,699	$ 1,749	$ 5,125	$ 5,298
Operating revenues-affiliates	489	434	1,421	1,340
Total operating revenues	2,188	2,183	6,546	6,638
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	715	737	2,050	2,174
Selling, general and administrative	262	249	801	899
Operating expenses-affiliates	183	169	530	474
Depreciation and amortization	535	569	1,594	1,711
Total operating expenses	1,695	1,724	4,975	5,258
OPERATING INCOME	493	459	1,571	1,380
OTHER INCOME (EXPENSE)
Interest expense	(116)	(109)	(336)	(334)
Interest expense-affiliate	(20)	(4)	(48)	(8)
Net loss on early retirement of debt	0	(1)	0	(47)
Other income (expense)	0	0	1	(1)
Total other income (expense)	(136)	(114)	(383)	(390)
INCOME BEFORE INCOME TAX EXPENSE	357	345	1,188	990
Income tax expense	139	133	460	382
NET INCOME	$ 218	$ 212	$ 728	$ 608