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FAIR VALUE MEASUREMENTS
12 Months Ended
Dec. 31, 2019
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
PG&E Corporation and the Utility measure their cash equivalents, trust assets and price risk management instruments at fair value.  A three-tier fair value hierarchy is established that prioritizes the inputs to valuation methodologies used to measure fair value:

Level 1 – Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 – Other inputs that are directly or indirectly observable in the marketplace.

Level 3 – Unobservable inputs which are supported by little or no market activities.

The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.
Assets and liabilities measured at fair value on a recurring basis for PG&E Corporation and the Utility are summarized below.  Assets held in rabbi trusts are held by PG&E Corporation and not the Utility.
 Fair Value Measurements
 
 At December 31, 2019
(in millions)Level 1Level 2Level 3
Netting (1)
Total
Assets:     
Short-term investments$1,323  $—  $—  $—  $1,323  
Nuclear decommissioning trusts
Short-term investments —  —  —   
Global equity securities2,086  —  —  —  2,086  
Fixed-income securities862  728  —  —  1,590  
Assets measured at NAV—  —  —  —  21  
Total nuclear decommissioning trusts (2)
2,954  728  —  —  3,703  
Price risk management instruments (Note 10)     
Electricity—   161  (11) 152  
Gas—   —    
Total price risk management instruments—   161  (8) 158  
Rabbi trusts     
Fixed-income securities—  100  —  —  100  
Life insurance contracts—  73  —  —  73  
Total rabbi trusts—  173  —  —  173  
Long-term disability trust     
Short-term investments10  —  —  —  10  
Assets measured at NAV—  —  —  —  156  
Total long-term disability trust10  —  —  —  166  
TOTAL ASSETS$4,287  $906  $161  $(8) $5,523  
Liabilities:     
Price risk management instruments (Note 10)     
Electricity$ $ $156  $(13) $146  
Gas—   —  (1)  
TOTAL LIABILITIES$ $ $156  $(14) $147  
(1) Includes the effect of the contractual ability to settle contracts under master netting agreements and margin cash collateral.
(2) Represents amount before deducting $530 million, primarily related to deferred taxes on appreciation of investment value. 
 Fair Value Measurements
 
At December 31, 2018
(in millions)Level 1Level 2Level 3
Netting (1)
Total
Assets:     
Short-term investments$1,593  $—  $—  $—  $1,593  
Nuclear decommissioning trusts
Short-term investments29  —  —  —  29  
Global equity securities1,793  —  —  —  1,793  
Fixed-income securities661  639  —  —  1,300  
Assets measured at NAV—  —  —  —  16  
Total nuclear decommissioning trusts (2)
2,483  639  —  —  3,138  
Price risk management instruments (Note 10)            
Electricity—   203  51  259  
Gas—   —  37  38  
Total price risk management instruments—   203  88  297  
Rabbi trusts            
Fixed-income securities—  93  —  —  93  
Life insurance contracts—  67  —  —  67  
Total rabbi trusts—  160  —  —  160  
Long-term disability trust            
Short-term investments —  —  —   
Assets measured at NAV—  —  —  —  155  
Total long-term disability trust —  —  —  162  
TOTAL ASSETS$4,083  $805  $203  $88  $5,350  
Liabilities:            
Price risk management instruments (Note 10)            
Electricity  108  (10) 107  
Gas—   —  —   
TOTAL LIABILITIES$ $ $108  $(10) $109  
(1) Includes the effect of the contractual ability to settle contracts under master netting agreements and margin cash collateral.
(2) Represents amount before deducting $408 million, primarily related to deferred taxes on appreciation of investment value.

Valuation Techniques

The following describes the valuation techniques used to measure the fair value of the assets and liabilities shown in the tables above.  There are no restrictions on the terms and conditions upon which the investments may be redeemed. There were no material transfers between any levels for the years ended December 31, 2019 and 2018.

Trust Assets

Assets Measured at Fair Value

In general, investments held in the trusts are exposed to various risks, such as interest rate, credit, and market volatility risks. Nuclear decommissioning trust assets and other trust assets are composed primarily of equity and fixed-income securities and also include short-term investments that are money market funds valued at Level 1.

Global equity securities primarily include investments in common stock that are valued based on quoted prices in active markets and are classified as Level 1.
Fixed-income securities are primarily composed of U.S. government and agency securities, municipal securities, and other fixed-income securities, including corporate debt securities.  U.S. government and agency securities primarily consist of U.S. Treasury securities that are classified as Level 1 because the fair value is determined by observable market prices in active markets.  A market approach is generally used to estimate the fair value of fixed-income securities classified as Level 2 using evaluated pricing data such as broker quotes, for similar securities adjusted for observable differences.  Significant inputs used in the valuation model generally include benchmark yield curves and issuer spreads.  The external credit ratings, coupon rate, and maturity of each security are considered in the valuation model, as applicable.

Assets Measured at NAV Using Practical Expedient

Investments in the nuclear decommissioning trusts and the long-term disability trust that are measured at fair value using the NAV per share practical expedient have not been classified in the fair value hierarchy tables above.  The fair value amounts are included in the tables above in order to reconcile to the amounts presented in the Consolidated Balance Sheets.  These investments include commingled funds that are composed of equity securities traded publicly on exchanges as well as fixed-income securities that are composed primarily of U.S. government securities and asset-backed securities.

Price Risk Management Instruments

Price risk management instruments include physical and financial derivative contracts, such as power purchase agreements, forwards, futures, swaps, options, and CRRs that are traded either on an exchange or over-the-counter. 

Power purchase agreements, forwards, and swaps are valued using a discounted cash flow model.  Exchange-traded futures that are valued using observable market forward prices for the underlying commodity are classified as Level 1.  Over-the-counter forwards and swaps that are identical to exchange-traded futures, or are valued using forward prices from broker quotes that are corroborated with market data are classified as Level 2.  Exchange-traded options are valued using observable market data and market-corroborated data and are classified as Level 2. 

Long-dated power purchase agreements that are valued using significant unobservable data are classified as Level 3. These Level 3 contracts are valued using either estimated basis adjustments from liquid trading points or techniques, including extrapolation from observable prices, when a contract term extends beyond a period for which market data is available.  Market and credit risk management utilizes models to derive pricing inputs for the valuation of the Utility’s Level 3 instruments using pricing inputs from brokers and historical data.

The Utility holds CRRs to hedge the financial risk of CAISO-imposed congestion charges in the day-ahead market.  Limited market data is available in the CAISO auction and between auction dates; therefore, the Utility utilizes historical prices to forecast forward prices. CRRs are classified as Level 3.

Level 3 Measurements and Uncertainty Analysis

Inputs used and the fair value of Level 3 instruments are reviewed period-over-period and compared with market conditions to determine reasonableness.

Significant increases or decreases in any of those inputs would result in a significantly higher or lower fair value, respectively.  All reasonable costs related to Level 3 instruments are expected to be recoverable through customer rates; therefore, there is no impact to net income resulting from changes in the fair value of these instruments.  See Note 10 above.
 Fair Value at   
(in millions)At December 31, 2019Valuation
Technique
Unobservable
Input
 
Fair Value MeasurementAssetsLiabilities
 Range (1)/Weighted-Average Price (2)
Congestion revenue rights$140  $44  Market approachCRR auction prices
$ (20.20) - 20.20 / 0.28
Power purchase agreements$21  $112  Discounted cash flowForward prices
$ 11.77 - 59.38 / 33.62
(1) Represents price per megawatt-hour.
(2) Unobservable inputs were weighted by the relative fair value of the instruments.
 Fair Value at   
(in millions)At December 31, 2018Valuation
Technique
Unobservable
Input
 
Fair Value MeasurementAssetsLiabilities
Range (1)
Congestion revenue rights$203  $75  Market approachCRR auction prices
$ (18.61) - 32.26
Power purchase agreements$—  $33  Discounted cash flowForward prices
$ 19.81 - 38.80
(1) Represents price per megawatt-hour.

Level 3 Reconciliation

The following table presents the reconciliation for Level 3 price risk management instruments for the years ended December 31, 2019 and 2018, respectively:
 Price Risk Management Instruments
(in millions)20192018
Asset (liability) balance as of January 1$95  $42  
Net realized and unrealized gains:
Included in regulatory assets and liabilities or balancing accounts (1)
(90) 53  
Asset (liability) balance as of December 31$ $95  
(1) The costs related to price risk management activities are fully passed through to customers in rates. Accordingly, unrealized gains and losses are deferred in regulatory liabilities and assets and net income is not impacted.

Financial Instruments

PG&E Corporation and the Utility use the following methods and assumptions in estimating fair value for financial instruments: the fair values of cash, net accounts receivable, short-term borrowings, accounts payable, customer deposits, and the Utility’s variable rate pollution control bond loan agreements approximate their carrying values at December 31, 2019 and 2018, as they are short-term in nature.

The carrying amount and fair value of PG&E Corporation’s and the Utility’s long-term debt instruments were as follows (the table below excludes financial instruments with carrying values that approximate their fair values):
 At December 31,
 20192018
(in millions)Carrying AmountLevel 2 Fair ValueCarrying AmountLevel 2 Fair Value
Debt (Note 5)    
PG&E Corporation(1)
$—  $—  $350  $350  
Utility (1)(2)
1,500  1,500  17,450  14,747  
(1) On January 29, 2019 PG&E Corporation and the Utility filed for Chapter 11 protection. Debt held by PG&E Corporation became debt subject to compromise and is valued at the allowed claim amount. For more information, see Note 2 and Note 5.
(2) The fair value of the Utility pre-petition debt is $17.9 billion as of December 31, 2019. For more information, see Note 2 and Note 5.
Nuclear Decommissioning Trust Investments

The following table provides a summary of equity securities and available-for-sale debt securities:
(in millions)Amortized
Cost
Total
Unrealized
Gains
Total
Unrealized
Losses
Total Fair
Value
As of December 31, 2019    
Nuclear decommissioning trusts    
Short-term investments$ $—  $—  $ 
Global equity securities500  1,609  (2) 2,107  
Fixed-income securities1,505  89  (4) 1,590  
Total (1)
$2,011  $1,698  $(6) $3,703  
As of December 31, 2018    
Nuclear decommissioning trusts    
Short-term investments$29  $—  $—  $29  
Global equity securities568  1,246  (5) 1,809  
Fixed-income securities1,288  30  (18) 1,300  
Total (1)
$1,885  $1,276  $(23) $3,138  
(1) Represents amounts before deducting $530 million and $408 million at December 31, 2019 and 2018, respectively, primarily related to deferred taxes on appreciation of investment value.

The fair value of fixed-income securities by contractual maturity is as follows:
 As of
(in millions)December 31, 2019
Less than 1 year$42  
1–5 years488  
5–10 years397  
More than 10 years663  
Total maturities of fixed-income securities$1,590  

The following table provides a summary of activity for the fixed-income and equity securities:
(in millions)201920182017
Proceeds from sales and maturities of nuclear decommissioning investments$956  $1,412  $1,291  
Gross realized gains on securities 69  54  53  
Gross realized losses on securities(14) (24) (11)