CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING REVENUES
Operating revenues	$ 1,486	$ 1,599
Operating revenues - affiliates	676	654
Total operating revenues	2,162	2,253
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	720	708
Selling, general and administrative	244	250
Operating expenses - affiliates	227	251
Depreciation and amortization	391	419
Total operating expenses	1,582	1,628
OPERATING INCOME	580	625
OTHER (EXPENSE) INCOME
Interest expense	(114)	(121)
Interest expense - affiliates, net	(15)	(14)
Other income, net	1	2
Total other expense, net	(128)	(133)
INCOME BEFORE INCOME TAX EXPENSE	452	492
Income tax expense	174	188
NET INCOME	$ 278	$ 304