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Retirement and Other Benefit Plans - Additional Information (Details) - USD ($)
 12 Months Ended
Apr. 15, 2019
Apr. 03, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 29, 2017
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]          
Shares fully vested, Description     Shares allocated to a participant’s account are fully vested after six years of credited service, or in the event(s) of reaching age 65, death or disability while an active employee of the Company.    
Shares fully vested after credited service     6 years    
Common stock shares outstanding including ESOP     100,669,694    
Company's stock held by ESOP     78,896,806 78,172,809  
ESOP shares redemption, value       $ 1,900,000,000  
ESOP dividends declared date   Apr. 03, 2019      
ESOP dividends declared per share   $ 2.00      
ESOP dividends declared amount   $ 52,100,000      
ESOP dividends payment date   May 10, 2019      
Common stock dividend ratio 200.00%        
Dividends declared date Apr. 15, 2019        
Dividends payment, date May 08, 2019        
Dividends record date May 07, 2019        
Dividends declared amount       0 $ 0
Contribution to 401 (k) plan     $ 25,200,000 17,100,000 15,800,000
Other Noncurrent Assets          
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]          
Defined benefit pension plan, net assets position     2,100,000 1,700,000  
Direct Costs of Contracts and Indirect, General and Administrative Expense          
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]          
ESOP contribution expense     $ 55,500,000 $ 45,200,000 $ 40,600,000