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Reportable Segments - Reportable Segment Financial Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
EMG
Segment Reporting Information [Line Items]
Additions to property, plant and equipment from acquired business	$ 20.0	$ 29.2

X

- Definition

Acquired property, plant and equipment.

+ References

No definition available.

+ Details

Name:	ame_AcquiredPropertyPlantAndEquipment
Namespace Prefix:	ame_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ame_ElectromechanicalGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: