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Financial instruments - Long-term Energy Derivative Contracts (Detail) - Cash flow hedge	Dec. 31, 2023 MWh $ / MWh
PJM Western HUB, Expiry December 2028
Derivative [Line Items]
Notional quantity (MW-hrs) | MWh	353,597
Receive average prices (per MW-hr) | $ / MWh	29.19
NI HUB, Expiry December 2027
Derivative [Line Items]
Notional quantity (MW-hrs) | MWh	1,492,926
Receive average prices (per MW-hr) | $ / MWh	21.34
ERCOT North HUB, Expiry December 2027
Derivative [Line Items]
Notional quantity (MW-hrs) | MWh	1,332,645
Receive average prices (per MW-hr) | $ / MWh	36.46
Illinois Hub, Expiry September 2030
Derivative [Line Items]
Notional quantity (MW-hrs) | MWh	3,534,802
Receive average prices (per MW-hr) | $ / MWh	24.54

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- Definition

The average strike price on the group of price risk option contracts such as put options or call options.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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-Topic 815
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-Section 50
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- Definition

Nominal number of units used to calculate payment on derivative.

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