Guarantees Guarantees (Tables)

12 Months Ended

Dec. 31, 2016

Guarantees [Abstract]

Summary of NRG's estimated guarantees, indemnity, and other contingent liability

The following table summarizes the maximum potential exposures that can be estimated for NRG's guarantees, indemnities, and other contingent liabilities by maturity:

	By Remaining Maturity at December 31,
	2016
Guarantees	Under 1 Year		1-3 Years		3-5 Years		Over 5 Years		Total		2015 Total
	(In millions)
Letters of credit and surety bonds	$	2,122	$	80	$	—	$	15	$	2,217	$	1,899
Asset sales guarantee obligations	—		420		—		257		677		257
Other guarantees	—		—		5		731		736		722
Total guarantees	$	2,122	$	500	$	5	$	1,003	$	3,630	$	2,878