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No definition available.

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Recent Financing Transactions - NPC (Details) - NPC - USD ($) $ in Millions	Jun. 30, 2023	May 31, 2023	Mar. 31, 2023
NPC Pollution Control Refunding Revenue Bonds, 1.875%, Series 2017A, due 2032 \| NVE Holdings
Debt Instrument [Line Items]
Repurchased amount			$ 40
Face amount			$ 40
Stated interest rate			4.125%
NPC Pollution Control Refunding Revenue Bonds, 1.65%, Series 2017B, due 2039 \| NVE Holdings
Debt Instrument [Line Items]
Repurchased amount			$ 13
Face amount			$ 13
Stated interest rate			3.75%
NPC Pollution Control Refunding Revenue Bonds, 1.65%, Series 2017, Due 2036 \| NVE Holdings
Debt Instrument [Line Items]
Repurchased amount			$ 40
Face amount			$ 40
Stated interest rate			3.75%
Secured credit facility, expiring June 2026 \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 600	$ 400