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Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Estimated carrying amounts and fair values of NRG's recorded financial instruments not carried at fair market value

The estimated carrying value and fair value of the Company's long-term debt, including current portion, is as follows:

			March 31, 2023												December 31, 2022
(In millions)			Carrying Amount						Fair Value						Carrying Amount						Fair Value
Convertible Senior Notes			$	575					$	595					$	575					$	576
Other long-term debt, including current portion			11,784						11,012						7,523						6,432
Total long-term debt, including current portion(a)			$	12,359					$	11,607					$	8,098					$	7,008

(a)Excludes deferred financing costs, which are recorded as a reduction to long-term debt in the Company's consolidated balance sheets

Schedule of Fair Value Hierarchy for Long-term Debt

The following table presents the level within the fair value hierarchy for long-term debt, including current portion, as of March 31, 2023 and December 31, 2022:

			March 31, 2023												December 31, 2022
(In millions)			Level 2						Level 3						Level 2						Level 3
Convertible Senior Notes			$	595					$	—					$	576					$	—
Other long-term debt, including current portion			10,062						950						6,432						—
Total long-term debt, including current portion			$	10,657					$	950					$	7,008					$	—

Assets and liabilities measured and recorded at fair value on the consolidated balance sheets on a recurring basis

The following tables present assets and liabilities measured and recorded at fair value on the Company's condensed consolidated balance sheets on a recurring basis and their level within the fair value hierarchy:

			March 31, 2023
			Fair Value
(In millions)			Total						Level 1						Level 2						Level 3
Investments in securities (classified within other current and non-current assets)			$	19					$	—					$	19					$	—
Nuclear trust fund investments:
Cash and cash equivalents			13						13						—						—
U.S. government and federal agency obligations			98						96						2						—
Federal agency mortgage-backed securities			101						—						101						—
Commercial mortgage-backed securities			34						—						34						—
Corporate debt securities			113						—						113						—
Equity securities			430						430						—						—
Foreign government fixed income securities			1						1						—						—
Other trust fund investments (classified within other non-current assets):
U.S. government and federal agency obligations			1						1						—						—
Derivative assets:
Foreign exchange contracts			15						—						15						—
Commodity contracts			7,725						1,331						5,360						1,034
Interest rate contracts			10						—						10						—
Measured using net asset value practical expedient:
Equity securities — nuclear trust fund investments			89
Equity securities (classified within other non-current assets)			6
Total assets			$	8,655					$	1,872					$	5,654					$	1,034
Derivative liabilities:
Foreign exchange contracts			$	1					$	—					$	1					$	—
Commodity contracts			6,116						1,422						4,131						563
Interest rate contracts			15						—						15						—
Consumer Financing Program			111						—						—						111
Total liabilities			$	6,243					$	1,422					$	4,147					$	674

			December 31, 2022
(In millions)			Total						Level 1						Level 2						Level 3
Investments in securities (classified within other current and non-current assets)			$	19					$	—					$	19					$	—
Nuclear trust fund investments:
Cash and cash equivalents			15						15						—						—
U.S. government and federal agency obligations			86						84						2						—
Federal agency mortgage-backed securities			101						—						101						—
Commercial mortgage-backed securities			35						—						35						—
Corporate debt securities			114						—						114						—
Equity securities			403						403						—						—
Foreign government fixed income securities			1						—						1						—
Other trust fund investments (classified within other non-current assets):
U.S. government and federal agency obligations			1						1						—						—
Derivative assets:
Foreign exchange contracts			18						—						18						—
Commodity contracts			11,976						1,929						8,796						1,251
Measured using net asset value practical expedient:
Equity securities — nuclear trust fund investments			83
Equity securities (classified within other non-current assets)			6
Total assets			$	12,858					$	2,432					$	9,086					$	1,251
Derivative liabilities:
Foreign exchange contracts			$	2					$	—					$	2					$	—
Commodity contracts			8,439						1,244						6,449						746
Total liabilities			$	8,441					$	1,244					$	6,451					$	746

Reconciliation of beginning and ending balances for financial instruments that are recognized at fair value in the consolidated financial statements at least annually using significant unobservable inputs

The following table reconciles, for the three months ended March 31, 2023 and 2022, the beginning and ending balances for financial instruments that are recognized at fair value in the condensed consolidated financial statements, using significant unobservable inputs, for commodity derivatives:

			Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
			Commodity Derivatives(a)
(In millions)			Three months ended March 31, 2023						Three months ended March 31, 2022
Beginning balance			$	505					$	293
Total (losses)/gains realized/unrealized included in earnings			(91)						166
Purchases			41						23
Transfers into Level 3(b)			24						53
Transfers out of Level 3(b)			(8)						(7)
Ending balance			$	471					$	528
(Losses)/Gains for the period included in earnings attributable to the change in unrealized gains or losses relating to assets or liabilities still held as of period end			$	(55)					$	237

(a)Consists of derivative assets and liabilities, net, excluding derivatives liabilities from Consumer Financing Program, which are presented in a separate table below.

(b)Transfers into/out of Level 3 are related to the availability of external broker quotes and are valued as of the end of the reporting period. All transfers in/out are with Level 2

Reconciliation of Contractual Obligations of Consumer Financing Program Recognized at Fair Value

The following table reconciles, for the three months ended March 31, 2023 the beginning and ending balances of the contractual obligations from the Consumer Financing Program that are recognized at fair value in the condensed consolidated financial statements, using significant unobservable inputs:

			Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
			Consumer Financing Program
(In millions)			Three months ended March 31, 2023
Beginning balance			$	—
Contractual obligations added from the acquisition of Vivint			112
New contractual obligations			2
Settlements			(3)
Ending balance			$	111

Significant unobservable inputs used developing fair values, Quantitative Information

The following tables quantify the significant, unobservable inputs used in developing the fair value of the Company's Level 3 positions as of March 31, 2023 and December 31, 2022:

			March 31, 2023
			Fair Value																								Input/Range
(In millions)			Assets						Liabilities						Valuation Technique						Significant Unobservable Input						Low						High						Weighted Average
Natural Gas Contracts			$	152					$	196					Discounted Cash Flow						Forward Market Price (per MMBtu)						$	1					$	17					$	4
Power Contracts			827						292						Discounted Cash Flow						Forward Market Price (per MWh)						2						326						45
FTRs			55						75						Discounted Cash Flow						Auction Prices (per MWh)						(30)						145						0
Consumer Financing Program			—						111						Discounted Cash Flow						Collateral Default Rate						1.80		%				52.50		%				6.16		%
															Discounted Cash Flow						Collateral Prepayment Rate						2.00		%				3.00		%				2.87		%
															Discounted Cash Flow						Loss Severity Rates						6.00		%				36.00		%				10.88		%
			$	1,034					$	674

			December 31, 2022
			Fair Value																								Input/Range
(In millions)			Assets						Liabilities						Valuation Technique						Significant Unobservable Input						Low						High						Weighted Average
Natural Gas Contracts			$	340					$	448					Discounted Cash Flow						Forward Market Price (per MMBtu)						$	2					$	48					$	6
Power Contracts			843						216						Discounted Cash Flow						Forward Market Price (per MWh)						3						431						48
FTRs			68						82						Discounted Cash Flow						Auction Prices (per MWh)						(32)						610						0
			$	1,251					$	746

Fair value inputs, sensitivity analysis

The following table provides sensitivity of fair value measurements to increases/(decreases) in significant, unobservable inputs as of March 31, 2023 and December 31, 2022:

Significant Unobservable Input

Position

Change In Input

Impact on Fair Value Measurement

Forward Market Price Natural Gas/Power

Buy

Increase/(Decrease)

Higher/(Lower)

Forward Market Price Natural Gas/Power

Sell

Increase/(Decrease)

Lower/(Higher)

FTR Prices

Buy

Increase/(Decrease)

Higher/(Lower)

FTR Prices

Sell

Increase/(Decrease)

Lower/(Higher)

Collateral Default Rates

n/a

Increase/(Decrease)

Higher/(Lower)

Collateral Prepayment Rates

n/a

Increase/(Decrease)

Lower/(Higher)

Loss Severity Rates

n/a

Increase/(Decrease)

Higher/(Lower)

Net counterparty credit exposure by industry sector and by counterparty credit quality

The following tables highlight net counterparty credit exposure by industry sector and by counterparty credit quality. Net counterparty credit exposure is defined as the aggregate net asset position for NRG with counterparties where netting is permitted under the enabling agreement and includes all cash flow, mark-to-market and NPNS, and non-derivative transactions. The exposure is shown net of collateral held and includes amounts net of receivables or payables.

			Net Exposure(a)(b)
Category by Industry Sector			(% of Total)
Utilities, energy merchants, marketers and other			71		%
Financial institutions			29
Total as of March 31, 2023			100		%

			Net Exposure (a)(b)
Category by Counterparty Credit Quality			(% of Total)
Investment grade			55		%
Non-investment grade/non-rated			45
Total as of March 31, 2023			100		%

(a)Counterparty credit exposure excludes uranium and coal transportation contracts because of the unavailability of market prices

(b)The figures in the tables above exclude potential counterparty credit exposure related to RTOs, ISOs, registered commodity exchanges and certain long-term contracts

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