XML 84 R71.htm IDEA: XBRL DOCUMENT v3.22.0.1
Retirement Benefits (Plan Assets by Category and Fair Value Measurement Level) (Details) - Pension Benefits - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 25, 2020
Dec. 27, 2019
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets $ 347,900 $ 373,565 $ 303,944
Investments categorized in fair value hierarchy      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 31,229 33,111  
Investments measured at net asset value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 316,671 340,454  
Cash and cash equivalents | Level 1 | Fair Value, Recurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 303 1,234  
Insurance contract | Level 3 | Fair Value, Nonrecurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 30,926 31,877  
Equity | Fair Value, Recurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 178,035 166,077  
U.S. Large Cap | Fair Value, Recurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 110,569 89,003  
U.S. Small/Mid Cap | Fair Value, Recurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 11,338 20,313  
International | Fair Value, Recurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 56,128 56,761  
Fixed income | Fair Value, Recurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets 130,774 161,706  
Real estate and other | Fair Value, Recurring [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value, plan assets $ 7,862 $ 12,671