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Defined Benefit Plans (Tables)

12 Months Ended

Dec. 30, 2023

Retirement Benefits [Abstract]

Obligations and Funded Status

(In millions)			Pension Benefits										Postretirement Benefits
			2023					2022					2023					2022
Change in the Projected Benefit Obligation (PBO):
Projected benefit obligation at beginning of year			$	543.6				$	712.0				$	9.0				$	9.8
Service cost				0.1					0.2					0.4					0.4
Interest cost				27.2					20.4					0.5					0.4
Actuarial (gain) loss				(0.5	)				(155.9	)				(1.3	)				(1.2	)
Benefits paid				(60.7	)				(33.1	)				(0.6	)				(0.4	)
Projected benefit obligation at end of year			$	509.7				$	543.6				$	8.0				$	9.0
Accumulated benefit obligation at end of year    (excludes the impact of future compensation increases)			$	509.7				$	543.6				$	—				$	—
Change in Plan Assets:
Fair value of plan assets at beginning of year			$	482.5				$	649.8				$	—				$	—
Actual return on plan assets				40.5					(144.8	)				—					—
Employer contributions				5.7					10.6					0.6					0.4
Benefits paid				(60.7	)				(33.1	)				(0.6	)				(0.4	)
Fair value of plan assets at end of year			$	468.0				$	482.5				$	—				$	—
Funded status (Fair value of plan assets less PBO)			$	(41.7	)			$	(61.1	)			$	(8.0	)			$	(9.0	)

Amounts Recognized in Consolidated Balance Sheets

Amounts recognized in the consolidated balance sheets consist of:

		Pension Benefits										Postretirement Benefits
(In millions)		2023					2022					2023					2022
Current benefit payment liability		$	(1.3	)			$	(1.5	)			$	(1.1	)			$	(1.2	)
Accrued benefit liability			(40.4	)				(59.6	)				(6.9	)				(7.8	)
Net amount recognized		$	(41.7	)			$	(61.1	)			$	(8.0	)			$	(9.0	)

Amounts in Accumulated Other Comprehensive Loss that have not yet been Recognized as Components of Net Periodic Benefit Cost

The amounts in accumulated other comprehensive loss on the consolidated balance sheets that have not yet been recognized as components of net periodic benefit cost were as follows:

(In millions)		Pension Benefits					Postretirement Benefits
Net unrecognized actuarial loss (gain) at December 31, 2021		$	32.4				$	(0.4	)
Recognition of actuarial gain			0.3					1.0
Current year actuarial loss (gain)			17.0					(1.1	)
Net unrecognized actuarial loss (gain) at December 31, 2022		$	49.7				$	(0.5	)
Recognition of actuarial gain			—					2.6
Current year actuarial (gain)			(12.5	)				(1.5	)
Net actuarial (loss) due to settlement			(2.0	)				—
Net unrecognized actuarial loss at December 30, 2023		$	35.2				$	0.6

Components of Net Periodic Benefit Cost for Pension and Postretirement Benefits

Components of net periodic benefit cost were as follows:

		Pension Benefits														Postretirement Benefits
(In millions)		2023					2022				2021					2023					2022				2021
Service cost		$	0.1				$	0.2			$	0.4				$	0.4				$	0.4			$	0.2
Interest cost			27.2					20.4				19.3					0.5					0.4				0.2
Expected return on plan assets			(28.6	)				(28.1	)			(27.4	)				—					—				—
Recognition of actuarial losses (gains)			—					(0.3	)			1.1					(2.6	)				(1.0	)			(0.5	)
Settlement loss			2.0					—				—					—					—				—
Net periodic benefit (income) cost		$	0.7				$	(7.8	)		$	(6.6	)			$	(1.7	)			$	(0.2	)		$	(0.1	)

Schedule of Assumptions Used

		Pension Benefits														Postretirement Benefits
		2023					2022				2021					2023					2022				2021
Weighted-Average Assumptions Used to    Determine Benefit Obligations:
Discount rate			5.0	%				5.2	%			2.9	%				6.0	%				5.8	%			3.9	%
Weighted-Average Assumptions Used to    Determine Net Cost:
Discount rate			5.2	%				2.9	%			2.6	%				5.8	%				3.9	%			5.9	%
Expected long-term rate of return on plan assets			6.1	%				4.4	%			4.4	%				—					—				—

Assumed Health Care Cost Trend Rates Used to Determine Benefit Obligations and Net Cost

		Postretirement Benefits
		2023				2022
Assumed Health Care Cost Trend Rates Used to Determine    Benefit Obligations:
Health care cost trend rate assumed for next year		7.3/6.9	%	(a)		5.8/6.3	%	(a)
Rate that the cost trend rate is assumed to decline    (the ultimate trend rate)		4.5	%			4.5	%
Year that the rate reaches the ultimate trend rate		2033				2028
Assumed Health Care Cost Trend Rates Used to Determine   Net Cost:
Health care cost trend rate assumed for next year		5.8/6.3	%	(a)		6.0/6.5	%	(a)
Rate that the cost trend rate is assumed to decline    (the ultimate trend rate)		4.5	%			4.5	%
Year that the rate reaches the ultimate trend rate		2028				2028

(a)The pre-65 initial health care cost trend rate is shown first / followed by the post-65 rate.

Fair Value of Pension Assets by Major Category of Plan Assets

The fair value of the pension assets by major category of plan assets as of December 30, 2023 and December 31, 2022 were as follows:

(In millions)
		2023				2022
Group annuity/insurance contracts (level 3)		$	26.8			$	26.0
Collective trusts:
Cash and cash equivalents			17.5				6.3
Equity			121.2				113.8
Fixed income			267.2				291.6
Multi-strategy hedge funds			16.3				21.3
Real estate			19.0				23.5
Total		$	468.0			$	482.5

Reconciliation of Level Three Measurements

A reconciliation of Level 3 measurements was as follows:

		Group annuity/ insurance contracts
(In millions)		2023					2022
Beginning of year		$	26.0				$	25.5
Actual return on assets related to assets still held			0.8					0.5
End of year		$	26.8				$	26.0

Schedule of Expected Benefit Payments

The following retirement benefit payments are expected to be paid:

(In millions)		Pension Benefits					Postretirement Benefits
2024		$	35.4				$	1.3
2025			36.1					1.2
2026			36.6					1.1
2027			36.7					1.1
2028			36.6					1.0
Years 2029-2033			181.1					5.0

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