Defined Benefit Pension Plans - Allocation of Pension Plan Assets (Detail)	Dec. 29, 2018	Dec. 30, 2017
Hedge Funds
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	40.00%	38.00%
U.S. Equity Securities
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	18.00%	20.00%
Debt Securities
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	20.00%	18.00%
Foreign Equity Securities
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	14.00%	17.00%
Real Estate
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	6.00%	5.00%
Commodity [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	2.00%	2.00%
Insurance Contracts
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	0.00%	0.00%
Cash and Cash Equivalents [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Pension plan assets allocation percentage	0.00%	0.00%