Performance Contingent Total Shareholder Return Shares (Detail) - Total Shareholders Return	9 Months Ended
	Oct. 03, 2020
90th Percentile
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Line Items]
Payout as % of Target	200.00%
Percentile	90.00%
70th Percentile
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Line Items]
Payout as % of Target	150.00%
Percentile	70.00%
50th Percentile
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Line Items]
Payout as % of Target	100.00%
Percentile	50.00%
30th Percentile
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Line Items]
Payout as % of Target	50.00%
Percentile	30.00%
Below 30th Percentile
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Line Items]
Payout as % of Target	0.00%
Percentile	30.00%