Risk Management and Hedging Activities - PacifiCorp - Balance Sheet Location (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		$ (237)	$ (197)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		103	75
Derivative Assets (Liabilities), at Fair Value, Net		(134)	(122)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		28	41
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		0	0
Derivative Assets (Liabilities), at Fair Value, Net		28	41
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		(145)	(153)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		40	56
Derivative Assets (Liabilities), at Fair Value, Net		(105)	(97)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		(188)	(158)
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		28	40
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		(109)	(127)
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	[1]	106	135
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	[1]	(292)	(291)
Derivative, Fair Value, Net		(186)	(156)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts		250	223	$ 182	$ 235
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	[1]	25	47
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	[1]	(4)	(11)
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	[1]	7	21
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	[1]	(113)	(146)
PacifiCorp [Member] | Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		(136)	(85)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		75	28
Derivative Assets (Liabilities), at Fair Value, Net		(61)	(57)
PacifiCorp [Member] | Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		9	18
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		0	0
Derivative Assets (Liabilities), at Fair Value, Net		9	18
PacifiCorp [Member] | Commodity Contract [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		0	0
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		0	0
Derivative Assets (Liabilities), at Fair Value, Net		0	0
PacifiCorp [Member] | Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		(56)	(54)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		18	14
Derivative Assets (Liabilities), at Fair Value, Net		(38)	(40)
PacifiCorp [Member] | Commodity Contract [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net		(89)	(49)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		57	14
Derivative Assets (Liabilities), at Fair Value, Net		(32)	(35)
PacifiCorp [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		12	29
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(148)	(114)
Derivative, Fair Value, Net		(136)	(85)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts		133	85	$ 55
PacifiCorp [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		10	28
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(1)	(10)
Derivative, Fair Value, Net		9	18
PacifiCorp [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Derivative, Fair Value, Net		0	0
PacifiCorp [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		2	1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(58)	(55)
Derivative, Fair Value, Net		(56)	(54)
PacifiCorp [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(89)	(49)
Derivative, Fair Value, Net		$ (89)	$ (49)

[1] The Company's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of December 31, 2015 and 2014, a net regulatory asset of $250 million and $223 million, respectively, was recorded related to the net derivative liability of $186 million and $156 million, respectively. The difference between the net regulatory asset and the net derivative liability relates primarily to a power purchase agreement derivative at BHE Renewables.