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Finance Lease Receivables (Details) - CAD ($) $ in Millions	Dec. 31, 2024	Dec. 04, 2024	Mar. 31, 2024	Dec. 31, 2023
Disclosure of recognised finance lease as assets by lessee [line items]
Minimum lease receipts	$ 480			$ 257
Present value of minimum lease receipts	335			190
Less: unearned finance lease income	146			67
Less: unearned finance lease income	0			0
Add: unguaranteed residual value	0			0
Add: unguaranteed residual value	1			0
Total finance lease receivables	335		$ 48	190
Current portion of finance lease receivables	30			19
Long-term portion of finance lease receivables	305			171
Heartland Generation
Disclosure of recognised finance lease as assets by lessee [line items]
Long-term portion of finance lease receivables		$ 107
Current portion of finance lease receivables		$ 8
Within one year
Disclosure of recognised finance lease as assets by lessee [line items]
Minimum lease receipts	48			28
Present value of minimum lease receipts	47			28
Second to fifth years inclusive
Disclosure of recognised finance lease as assets by lessee [line items]
Minimum lease receipts	185			112
Present value of minimum lease receipts	159			98
More than five years
Disclosure of recognised finance lease as assets by lessee [line items]
Minimum lease receipts	247			117
Present value of minimum lease receipts	$ 129			$ 64

X

- Definition

The amount of current finance lease receivables. [Refer: Finance lease receivables]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
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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 amount of the discounted unguaranteed residual value of assets subject to finance leases. Unguaranteed residual value is the portion of the residual value of the underlying asset, the realisation of which by a lessor is not assured or is guaranteed solely by a party related to the lessor. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 94
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_94&doctype=Standard
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- Definition

The amount of receivables related to finance leases.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
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- Definition

The amount of non-current finance lease receivables. [Refer: Finance lease receivables]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
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- Definition

The amount of undiscounted finance lease payments to be received. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2024-01-01
-Paragraph 94
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- Definition

The amount of unearned finance income relating to the finance lease payments receivable. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. [Refer: Finance income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Current Finance Lease Receivables Recognised As Of Acquisition Date

+ References

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- Definition

Discounted unguaranteed residual value of assets subject to finance lease, present value

+ References

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- Definition

Noncurrent Finance Lease Receivables Recognised As Of Acquisition Date

+ References

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- Definition

Undiscounted finance lease payments to be received, at present value

+ References

No definition available.

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- Definition

Unearned finance income relating to finance lease payments receivable, present value

+ References

No definition available.

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