Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Service revenues	$ 1,346	$ 1,256
Service revenues – commodity consideration (Note 2)	101	0
Product sales	636	727
Total revenues	2,083	1,983
Costs and expenses:
Product costs	613	579
Processing commodity expenses (Note 2)	35	0
Operating and maintenance expenses	351	361
Depreciation and amortization expenses	423	433
Selling, general, and administrative expenses	138	156
Other (income) expense – net	31	4
Total costs and expenses	1,591	1,533
Operating income (loss)	492	450
Equity earnings (losses)	82	107
Other investing income (loss) – net (Note 4)	4	271
Interest incurred	(218)	(221)
Interest capitalized	9	7
Other income (expense) – net	15	49
Income (loss) before income taxes	384	663
Provision (benefit) for income taxes	0	3
Net income (loss)	384	660
Less: Net income (loss) attributable to noncontrolling interests	24	26
Net income (loss) attributable to controlling interests	360	634
Allocation of net income (loss) for calculation of earnings per common unit:
Net income (loss) attributable to controlling interests	360	634
Allocation of net income (loss) to Class B units	7	11
Allocation of net income (loss) to common units	$ 353	$ 623
Basic earnings (loss) per common unit:
Net income (loss) per common unit	$ 0.37	$ 0.68
Weighted-average number of common units outstanding (thousands)	957,279	919,944
Diluted earnings (loss) per common unit:
Net income (loss) per common unit	$ 0.37	$ 0.68
Weighted-average number of common units outstanding (thousands)	957,336	920,250
Cash distributions per common unit	$ 0.614	$ 0.60
Other comprehensive income (loss):
Net unrealized gain (loss) from derivative instruments	$ 2	$ 4
Reclassifications into earnings of net derivative instruments (gain) loss	0	(1)
Other comprehensive income (loss)	2	3
Comprehensive income (loss)	386	663
Less: Comprehensive income attributable to noncontrolling interests	24	26
Comprehensive income (loss) attributable to controlling interests	$ 362	$ 637