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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Debt - Schedule of Long Term Debt (Details) - USD ($)	1 Months Ended
Debt - Schedule of Long Term Debt (Details) - USD ($)	Oct. 31, 2023	Sep. 30, 2023
Line of Credit [Member] \| Revolving Credit Facility [Member] \| NEP OpCo [Member]
Debt Instrument [Line Items]
Outstanding borrowings		$ 545,000,000
Debt issuances/borrowings		865,000,000
Line of Credit [Member] \| Revolving Credit Facility [Member] \| STX Holdings
Debt Instrument [Line Items]
Outstanding borrowings		177,000,000
Debt issuances/borrowings		177,000,000
Line of Credit [Member] \| Revolving Credit Facility [Member] \| STX Holdings \| Subsequent Event
Debt Instrument [Line Items]
Proceeds from Lines of Credit	$ 60,000,000
Line of Credit [Member] \| Revolving Credit Facility Due 2025 [Member] \| NEP OpCo [Member]
Debt Instrument [Line Items]
Outstanding borrowings		11,000,000
Secured Debt [Member] \| NEP OpCo [Member]
Debt Instrument [Line Items]
Debt issuances/borrowings		14,000,000
Letter of Credit [Member] \| Revolving Credit Facility [Member] \| NEP OpCo [Member]
Debt Instrument [Line Items]
Total amount of letters of credit		53,000,000
Letter of Credit [Member] \| Revolving Credit Facility [Member] \| NEP OpCo [Member] \| Subsequent Event
Debt Instrument [Line Items]
Proceeds from Lines of Credit	85,000,000
Repayments of Lines of Credit	$ 35,000,000
Senior Notes [Member] \| Limited Recourse Debt
Debt Instrument [Line Items]
Debt issuances/borrowings		$ 330,000,000