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Business Combinations - Summary of Net Assets Acquired and Total Consideration Transferred Business Combinations (Detail) - Acquisitions 2021-2023 [member] - SEK (kr) kr in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Consideration Transferred Business Combinations [Line Items] |  |  |
Purchase price paid on acquisition | kr 579 | kr 51,297 | kr 256
Deferred consideration/Others | 0 | 1,972 | 0
Total consideration, all cash and cash equivalents | 579 | 53,269 | 256
Net assets (liabilities) acquired |  |  |
Intangible assets | 306 | 23,554 | (95)
Property, plant and equipment | 1 | 186 | 1
Right-of-use of assets | 2 | 334 | 0
Cash and cash equivalents | 7 | 521 | 0
Other assets | 83 | 5,344 | 21
Provisions, incl. post-employment benefits | 0 | (1,050) | 0
Other liabilities | (168) | (16,916) | (348)
Total identifiable net assets (liabilities) | 231 | 11,973 | (421)
Goodwill | 348 | 41,296 | 677
Total | 579 | 53,269 | 256
Acquisition-related costs | kr 36 | kr 436 | kr 11

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