Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 2,305	$ 2,228
Adjustments to reconcile net income to net cash flows from operating activities:
Gains (losses) on marketable securities, net	(336)	8
Depreciation and amortization	2,147	1,943
Allowance for equity funds	(75)	(59)
Equity income, net of distributions	17	(14)
Changes in regulatory assets and liabilities	263	17
Deferred income taxes and amortization of investment tax credits	(116)	573
Other, net	40	21
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(192)	(82)
Derivative collateral, net	9	(16)
Pension and other postretirement benefit plans	(61)	(29)
Accrued property, income and other taxes, net	190	390
Accounts payable and other liabilities	168	170
Net cash flows from operating activities	5,031	5,134
Cash flows from investing activities:
Capital expenditures	(4,203)	(3,179)
Acquisitions, net of cash acquired		(1,102)
Purchases of marketable securities	287	167
Proceeds from sales of marketable securities	266	186
Equity method investments	(236)	(80)
Other, net	48	(12)
Net cash flows from investing activities	(4,517)	(4,354)
Cash flows from financing activities:
Proceeds from BHE senior debt	3,166	0
Repayments of BHE senior debt and junior subordinated debentures	(650)	(1,344)
Common stock purchases	(107)	(19)
Proceeds from subsidiary debt	2,353	1,562
Repayments of subsidiary debt	(2,297)	(834)
Net (repayments of) proceeds from short-term debt	(2,694)	365
Purchase of redeemable noncontrolling interest	(131)	0
Other, net	(32)	(60)
Net cash flows from financing activities	(392)	(330)
Effect of exchange rate changes	(3)	6
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	119	456
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,402	$ 1,459