Pension Plans and Postretirement Benefits (Fair Value) (Details) - USD ($)	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Transfers between all three levels	$ 0	$ 0
Pension Benefits | Equity instruments
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation		47.00%
Pension Benefits | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation		53.00%
Fair Value, Measurements, Recurring | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	302,900,000	$ 335,300,000
Fair Value, Measurements, Recurring | Pension Benefits | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	180,800,000	155,600,000
Fair Value, Measurements, Recurring | Pension Benefits | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	400,100,000	332,900,000
Fair Value, Measurements, Recurring | Pension Benefits | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	580,900,000	488,500,000
Fair Value, Measurements, Recurring | Pension Benefits | Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	65,400,000	53,000,000.0
Fair Value, Measurements, Recurring | Pension Benefits | Cash and Cash Equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Cash and Cash Equivalents | Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	65,400,000	53,000,000.0
Fair Value, Measurements, Recurring | Pension Benefits | Equity instruments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	52,500,000	56,300,000
Fair Value, Measurements, Recurring | Pension Benefits | Equity instruments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	266,700,000	233,600,000
Fair Value, Measurements, Recurring | Pension Benefits | Equity instruments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Equity instruments | Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	319,200,000	289,900,000
Fair Value, Measurements, Recurring | Pension Benefits | U.S. government securities and futures | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	128,300,000	99,300,000
Fair Value, Measurements, Recurring | Pension Benefits | U.S. government securities and futures | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,600,000	0
Fair Value, Measurements, Recurring | Pension Benefits | U.S. government securities and futures | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | U.S. government securities and futures | Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	134,900,000	99,300,000
Fair Value, Measurements, Recurring | Pension Benefits | Corporate bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47,400,000	34,300,000
Fair Value, Measurements, Recurring | Pension Benefits | Corporate bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Corporate bonds | Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47,400,000	34,300,000
Fair Value, Measurements, Recurring | Pension Benefits | Insurance contracts related to foreign plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Insurance contracts related to foreign plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,000,000.0	12,000,000.0
Fair Value, Measurements, Recurring | Pension Benefits | Insurance contracts related to foreign plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Pension Benefits | Insurance contracts related to foreign plans | Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,000,000.0	12,000,000.0
Fair Value, Measurements, Recurring | Pension Benefits | Alternatives | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	195,300,000	204,100,000
Fair Value, Measurements, Recurring | Pension Benefits | Mutual funds | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,700,000	63,000,000.0
Fair Value, Measurements, Recurring | Pension Benefits | Senior secured loans | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		200,000
Fair Value, Measurements, Recurring | Pension Benefits | Mortgage-backed securities | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	49,200,000	42,800,000
Fair Value, Measurements, Recurring | Pension Benefits | High-yield bonds | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 28,700,000	$ 25,200,000