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Pension and Other Postretirement Benefit Plans - Narrative (Details) - Pension $ in Millions	3 Months Ended
	Mar. 30, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution towards defined benefit plan	$ 3.5
Minimum
Defined Benefit Plan Disclosure [Line Items]
Estimated employer's contribution towards defined benefit plan in current year	10.0
Maximum
Defined Benefit Plan Disclosure [Line Items]
Estimated employer's contribution towards defined benefit plan in current year	$ 15.0

X

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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