Business Developments And Risks And Uncertainties (Narrative) (Detail) - USD ($) $ in Millions		3 Months Ended
	Jan. 01, 2020	Mar. 31, 2020
Business Acquisition [Line Items]
Relief Fund Approved By Congress And President		$ 500,000
Federal legislation passed to combat the economic impact		2,200,000
Puerto Rico [Member]
Business Acquisition [Line Items]
Claims payments	$ 59
Outstanding bonds		$ 3,300