CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING REVENUES
Operating revenues	$ 2,661	$ 2,725
Operating revenues-affiliates	135	114
Total operating revenues	2,796	2,839
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	1,107	1,175
Selling, general and administrative	438	484
Operating expenses-affiliates	174	149
Depreciation and amortization	682	741
Total operating expenses	2,401	2,549
OPERATING INCOME	395	290
OTHER INCOME (EXPENSE)
Interest expense	(141)	(170)
Interest expense-affiliates	(65)	(4)
Net gain on early retirement of debt		8
Other income	6	1
Total other income (expense)	(200)	(165)
INCOME BEFORE INCOME TAX EXPENSE	195	125
Income tax expense	78	48
NET INCOME	$ 117	$ 77