Commitments - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 28, 2018 USD ($)
Standby Letters of Credit
Other Commitments And Contingencies [Line Items]
Letters of credit outstanding, amount	$ 73
Performance Guarantee
Other Commitments And Contingencies [Line Items]
Surety bonds	$ 44
Standby Letters of Credit and Surety Bonds
Other Commitments And Contingencies [Line Items]
Term of debt instrument (in years)	3 years