Sale of Assets - Narrative (Details) $ in Millions		3 Months Ended
	Mar. 20, 2020 USD ($) headquarters	Jun. 28, 2020 USD ($)
Sale of Assets [Abstract]
Proceeds from wage subsidy receivables, net of fees and retainers		$ 16.9
Percentage of receivables held as retainer		5.00%
Number of headquarters properties sold | headquarters	3
Number of headquarters properties | headquarters	4
Sale leaseback transactions, gross proceeds	$ 58.5
Sale leaseback transaction, net proceeds	55.5
Properties held-for-sale	23.4
Gain on sale on properties	$ 32.1