Leases - Additional Information (Detail) - SEK (kr) kr in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Disclosure Of Leases [Line Items]
Lease liabilities	kr 7,495	kr 7,455
Current lease liabilities	2,132	2,235
Lease cost	3,603	3,788
Depreciation	2,179	2,427
Impairment losses	(99)	(154)
Lease expense relating to low-value assets	432	459
Interest expense	421	464
Variable lease payments	472	284
Future cash outflows from leases not yet commenced	568	249
Sublease receivables for operating leases	69	70
Sublease receivables for financial leases	84	75
Sublease interest income from financial leases	kr 2	kr 5
Bottom of range [Member] \| Lessor [member]
Disclosure Of Leases [Line Items]
Leasing contract period	1 year
Top of range [Member] \| Lessor [member]
Disclosure Of Leases [Line Items]
Leasing contract period	5 years

Disclosure Of Leases.

No definition available.

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- Definition

Future cash outflows from leases not yet commenced.

+ References

No definition available.

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- Definition

Lease contract for a period.

+ References

No definition available.

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- Definition

Lease expenses.

+ References

No definition available.

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- Definition

Sublease receivables for financial leases.

+ References

No definition available.

+ Details

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- Definition

Sublease receivables for operating leases.

+ References

No definition available.

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- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph b
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-URIDate 2024-03-27

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- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-URIDate 2024-03-27

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- Definition

The amount of the expense relating to leases of low-value assets accounted for applying paragraph 6 of IFRS 16. This expense shall not include the expense relating to short-term leases of low-value assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
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-URIDate 2024-03-27

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- Definition

The amount of the expense relating to variable lease payments not included in the measurement of lease liabilities. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 53
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_e&doctype=Standard
-URIDate 2024-03-27

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- Definition

The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2024-01-01
-Paragraph 130
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-URIDate 2024-03-27

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- Definition

The amount of income from subleasing right-of-use assets. Sublease is a transaction for which an underlying asset is re-leased by a lessee (‘intermediate lessor’) to a third party, and the lease (‘head lease’) between the head lessor and lessee remains in effect. [Refer: Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 53
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_f&doctype=Standard
-URIDate 2024-03-27

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Balance Type:	credit
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- Definition

The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 53
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_b&doctype=Standard
-URIDate 2024-03-27

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- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

+ Details

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