Contingencies (Details) $ in Millions	3 Months Ended	4 Months Ended	6 Months Ended
	Jun. 26, 2020 plaintiff	Jun. 26, 2020 plaintiff	May 31, 2020 USD ($)
Loss Contingencies [Line Items]
Reserve funds			$ 27
Customer deposits			14
Estimate of reserve funds, per month			80
Estimate of reserve funds, maximum			$ 600
Subsequent Event
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff	4
Subsequent Event | Minimum
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff		100