Consolidated Balance Sheet (Unaudited) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,268	$ 881
Trade accounts and other receivables (net of allowance of $10 at March 31, 2018 and $9 at December 31, 2017)	718	972
Inventories	160	113
Other current assets and deferred charges	198	176
Total current assets	2,344	2,142
Investments	6,513	6,552
Property, plant, and equipment	39,876	38,931
Accumulated depreciation and amortization	(11,329)	(11,019)
Property, plant, and equipment – net	28,547	27,912
Intangible assets – net of accumulated amortization	8,643	8,790
Regulatory assets, deferred charges, and other	528	507
Total assets	46,575	45,903
Accounts payable:
Trade	755	957
Affiliate	58	134
Accrued interest	163	214
Other accrued liabilities	519	643
Long-term debt due within one year	501	501
Total current liabilities	1,996	2,449
Long-term debt	17,011	15,996
Asset retirement obligations	987	944
Deferred income tax liabilities	15	16
Regulatory liabilities, deferred income, and other	3,221	2,809
Contingent liabilities (Note 9)
Partners’ equity:
Common units (957,529,465 and 956,952,542 units outstanding at March 31, 2018 and December 31, 2017, respectively)	20,906	21,251
Class B units (18,124,096 and 17,853,088 units outstanding at March 31, 2018 and December 31, 2017, respectively)	788	784
Accumulated other comprehensive income (loss)	(3)	(5)
Total partners’ equity	21,691	22,030
Noncontrolling interests in consolidated subsidiaries	1,654	1,659
Total equity	23,345	23,689
Total liabilities and equity	$ 46,575	$ 45,903