Liability for shares yet to be repurchased

No definition available.

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Namespace Prefix:	fms_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Payments to acquire or redeem entity's shares, including true-ups

+ References

No definition available.

+ Details

Name:	fms_PaymentsToAcquireOrRedeemEntitySSharesIncludingTrueUps
Namespace Prefix:	fms_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total cost of shares repurchased divided by the total number of shares repurchased.

+ References

No definition available.

+ Details

Name:	fms_PurchaseOfTreasurySharesAverageCostPerShare
Namespace Prefix:	fms_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of repurchased shares.

+ References

No definition available.

+ Details

Name:	fms_PurchaseOfTreasuryStockShares
Namespace Prefix:	fms_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of tranches under share buy-back program

+ References

No definition available.

+ Details

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Namespace Prefix:	fms_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Share buyback program, percentage of share capital repurchased

+ References

No definition available.

+ Details

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Namespace Prefix:	fms_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares in the entity held by the entity or by its subsidiaries or associates. [Refer: Total for all associates [member]; Total for all subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 160
-Subparagraph a
-Clause vi
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph B10
-Subparagraph a
-Clause vi
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B10_a_vi&doctype=Appendix&subtype=B
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 79
-Subparagraph a
-Clause vi
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_79_a_vi&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- 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

No definition available.

+ Details

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Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

+ Details

Name:	srt_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ShareRepurchaseProgramAxis=fms_ShareBuyBackProgramTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
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- Details

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Notes to the consolidated statements of income - Share buyback program (Details) € / shares in Units, € in Thousands	1 Months Ended								5 Months Ended	8 Months Ended	9 Months Ended
	Mar. 31, 2026 EUR (€) € / shares shares	Feb. 28, 2026 EUR (€) € / shares shares	Jan. 31, 2026 EUR (€) € / shares shares	Dec. 31, 2025 € / shares shares	Nov. 30, 2025 EUR (€) € / shares shares	Oct. 31, 2025 EUR (€) € / shares shares	Sep. 30, 2025 EUR (€) € / shares shares	Aug. 31, 2025 EUR (€) € / shares shares	Dec. 29, 2025 EUR (€) shares	Mar. 31, 2026 EUR (€) € / shares shares	Apr. 30, 2026 shares	Jan. 09, 2026 EUR (€)	Aug. 11, 2025 EUR (€)	May 20, 2021 EUR (€) tranche
Share buy-back program
Number of shares repurchased \| shares	3,705,233	2,596,794	2,898,373	5,607,549	4,164,232	788,260	1,479,790	2,084,733		23,324,964
Average weighted stock price per repurchased share \| € / shares	€ 38.72	€ 39.67	€ 37.29	€ 40.26	€ 41.1	€ 46.38	€ 42.45	€ 42.68		€ 40.29
Share buy-back program value	€ 58,973									€ 58,973
Number of treasury shares held \| shares	23,324,964									23,324,964
Share buy-back program
Share buy-back program
Number of shares repurchased \| shares										23,324,964
Share buy-back program value														€ 1,000,000
Share buy-back program, number of tranches \| tranche														2
Share buy-back program \| Share buyback program non-adjusting event
Share buy-back program
Number of shares repurchased \| shares											24,848,819
Percentage of share capital repurchased											8.50%
First tranche
Share buy-back program
Number of shares repurchased \| shares				5,607,549	4,164,232	788,260	1,479,790	2,084,733	14,124,564
Share buy-back program value					€ 240,485	€ 411,651	€ 448,210	€ 511,021
Amount of shares repurchased									€ 586,450
First tranche \| Maximum
Share buy-back program
Share buy-back program value													€ 600,000
Second tranche
Share buy-back program
Number of shares repurchased \| shares	3,705,233	2,596,794	2,898,373
Share buy-back program value	€ 58,973	€ 202,449	€ 305,474							€ 58,973		€ 413,550
Liability related to shares yet to be repurchased	€ 67,384									€ 67,384