Derivative Instruments and Hedging Activity (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of the fair values of derivative instruments designated as cash flow hedging instruments included in balance sheets

The tables below present NEP's gross derivative positions, based on the total fair value of each derivative instrument, at March 31, 2018 and December 31, 2017, as required by disclosure rules, as well as the location of the net derivative positions, based on the expected timing of future payments, on the condensed consolidated balance sheets.



	March 31, 2018
	Gross Basis				Net Basis
	Assets		Liabilities		Assets		Liabilities
	(millions)
Interest rate contracts	$	44	$	125	$	26	$	107
Foreign currency contracts	—		1		—		1
Total fair values	$	44	$	126	$	26	$	108

Net fair value by balance sheet line item:
Other current assets					$	10
Assets held for sale					4
Other non-current assets					12
Current derivative liabilities							$	4
Liabilities associated with assets held for sale							6
Other non-current liabilities							98
Total derivatives					$	26	$	108



	December 31, 2017
	Gross Basis				Net Basis
	Assets		Liabilities		Assets		Liabilities
	(millions)
Interest rate contracts	$	15	$	44	$	18	$	47
Foreign currency contracts	—		3		—		3
Total fair values	$	15	$	47	$	18	$	50

Net fair value by balance sheet line item:
Other current assets					$	10
Other non-current assets					8
Current derivative liabilities							$	11
Other non-current liabilities							39
Total derivatives					$	18	$	50

Schedule of gains (losses) related to interest rate contracts

Gains (losses) related to NEP's interest rate contracts are recorded in the condensed consolidated financial statements as follows:



	Three Months Ended March 31,
	2018			2017
	(millions)
Interest rate contracts:
Losses reclassified from AOCI to interest expense	$	(2	)	$	(3	)
Losses recognized in interest expense	$	(52	)	$	(2	)