CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
OPERATING REVENUES
Operating revenues	$ 1,703	$ 1,763	$ 3,426	$ 3,549
Operating revenues-affiliates	496	432	932	906
Total operating revenues	2,199	2,195	4,358	4,455
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	690	694	1,335	1,437
Selling, general and administrative	270	311	539	650
Operating expenses-affiliates	185	161	347	305
Depreciation and amortization	529	574	1,059	1,142
Total operating expenses	1,674	1,740	3,280	3,534
OPERATING INCOME	525	455	1,078	921
OTHER INCOME (EXPENSE)
Interest expense	(112)	(112)	(220)	(225)
Interest expense-affiliate	(12)	(4)	(28)	(4)
Net loss on early retirement of debt		(46)		(46)
Other income (expense)		(2)	1	(1)
Total other income (expense)	(124)	(164)	(247)	(276)
INCOME BEFORE INCOME TAX EXPENSE	401	291	831	645
Income tax expense	155	113	321	249
NET INCOME	$ 246	$ 178	$ 510	$ 396