Retirement Benefits (Narrative) (Details) - Pension Plan	3 Months Ended
Apr. 03, 2026 plan
U.S
Defined Benefit Plan Disclosure [Line Items]
Number of frozen defined benefit plans	2
U.K.
Defined Benefit Plan Disclosure [Line Items]
Number of frozen defined benefit plans	1
Number of active defined benefit plans	1
Germany
Defined Benefit Plan Disclosure [Line Items]
Number of frozen defined benefit plans	1

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.

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+ Details