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Summary of Significant Accounting Policies - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Detail) - Recurring - USD ($)
$ in Millions
Dec. 31, 2022
Jan. 01, 2022
Assets    
Cash and cash equivalents $ 148.5 $ 745.3
Money market funds 54.4  
Pension assets 22.2  
Pension Asset, Cash and Cash Equivalents, Fair Value Disclosure 0.0  
Equity securities 0.0  
Debt securities 0.0  
Real estate funds 0.0  
Alternative investments 0.0  
Other 0.0  
Derivative instruments - cash flow hedges 19.7  
Total assets 244.8 745.3
Liabilities    
Total liabilities 0.0 0.0
Level 1    
Assets    
Cash and cash equivalents 148.5 745.3
Money market funds 54.4  
Pension assets 14.8  
Pension Asset, Cash and Cash Equivalents, Fair Value Disclosure 1.0  
Equity securities 6.6  
Debt securities 7.2  
Real estate funds 0.0  
Alternative investments 0.0  
Other 0.0  
Derivative instruments - cash flow hedges 0.0  
Total assets 217.7 745.3
Liabilities    
Total liabilities 0.0 0.0
Level 2    
Assets    
Cash and cash equivalents 0.0 0.0
Money market funds 0.0  
Pension assets 7.4  
Pension Asset, Cash and Cash Equivalents, Fair Value Disclosure 0.0  
Equity securities 0.0  
Debt securities 0.8  
Real estate funds 3.5  
Alternative investments 1.9  
Other 1.2  
Derivative instruments - cash flow hedges 19.7  
Total assets 27.1 0.0
Liabilities    
Total liabilities 0.0 0.0
Level 3    
Assets    
Cash and cash equivalents 0.0 0.0
Money market funds 0.0  
Pension assets 0.0  
Pension Asset, Cash and Cash Equivalents, Fair Value Disclosure 0.0  
Equity securities 0.0  
Debt securities 0.0  
Real estate funds 0.0  
Alternative investments 0.0  
Other 0.0  
Derivative instruments - cash flow hedges 0.0  
Total assets 0.0 0.0
Liabilities    
Total liabilities $ 0.0 $ 0.0