XML 103 R88.htm IDEA: XBRL DOCUMENT v3.25.4

Income Taxes - Reconciliation of Net Operating Losses, Tax Credit and Valuation Allowances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Reconciliation Of Net Operating Losses And Tax Credits [Roll Forward]
Beginning balance	$ 9.7	$ 12.3
Change in balance	13.0	(2.6)
Ending balance	22.7	9.7
Reconciliation Of Valuation Allowance, Deferred Tax Asset [Roll Forward]
Beginning balance	6.1	11.7
Change in balance	4.3	(5.6)
Ending balance	$ 10.4	$ 6.1

X

- Definition

Net operating losses and tax credits.

+ References

No definition available.

+ Details

Name:	aos_NetOperatingLossesAndTaxCredits
Namespace Prefix:	aos_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Net Operating Losses And Tax Credits, Change In Balance, Amount

+ References

No definition available.

+ Details

Name:	aos_NetOperatingLossesAndTaxCreditsChangeInBalanceAmount
Namespace Prefix:	aos_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Reconciliation Of Net Operating Losses And Tax Credits

+ References

No definition available.

+ Details

Name:	aos_ReconciliationOfNetOperatingLossesAndTaxCreditsRollForward
Namespace Prefix:	aos_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Reconciliation Of Valuation Allowance, Deferred Tax Asset

+ References

No definition available.

+ Details

Name:	aos_ReconciliationOfValuationAllowanceDeferredTaxAssetRollForward
Namespace Prefix:	aos_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

Name:	us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration