Self-Insurance (Narrative) (Details) - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Mar. 20, 2020	Feb. 01, 2020
Workers' compensation [Member]
Self-insurance reserve [Line Items]
Self-insurance policy retention per claim		$ 1
Workers' compensation policy limit		0
Employment practices liability [Member]
Self-insurance reserve [Line Items]
Self-insurance policy limit		30
Commercial general liability [Member]
Self-insurance reserve [Line Items]
Self-insurance policy limit		151
Commercial general liability [Member] | Subsequent Event [Member]
Self-insurance reserve [Line Items]
Self-insurance policy limit	$ 101
Other liability [Member]
Self-insurance reserve [Line Items]
Self-insurance policy retention per claim		$ 3