CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING REVENUES
Operating revenues	$ 1,599	$ 1,636
Operating revenues - affiliates	654	581
Total operating revenues	2,253	2,217
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	708	692
Selling, general and administrative	250	270
Operating expenses - affiliates	251	248
Depreciation and amortization	419	462
Total operating expenses	1,628	1,672
OPERATING INCOME	625	545
OTHER (EXPENSE) INCOME
Interest expense	(121)	(118)
Interest expense - affiliates, net	(14)	(13)
Other income, net	2	0
Total other expense, net	(133)	(131)
Income before income tax expense	492	414
Income tax expense	188	167
NET INCOME	$ 304	$ 247