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Credit Facilities, Long-Term Debt and Lease Liabilities - Currency Impacts (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]
Net increase (decrease) in borrowings under credit facilities	$ (143)	$ 46	$ (449)
USD | Senior Notes and Tax Equity
Disclosure of detailed information about borrowings [line items]
Notional amount	90	27
AUD | Non-Recourse Senior Secured Notes
Disclosure of detailed information about borrowings [line items]
Net increase (decrease) in borrowings under credit facilities	$ (5)	$ (9)

X

- Definition

The cash inflow (outflow) due to an increase (decrease) in current borrowings. [Refer: Current borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

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

+ References

No definition available.

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- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

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