Reconciliation Of Income Taxes at Federal Statutory Rate to Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Federal tax computed at the statutory rate	$ 30	$ 33	$ 105
State taxes, net of Federal benefit	6	10	12
Foreign income taxed at rates other than Federal	1	5	2
Increase (decrease) in valuation allowance	9	(3)	(36)
Non-deductible Merger expenses			3
Other non-deductible expenses and settlements	3	10
Tax basis differences in investment in subsidiaries		(4)
Non-taxable income and additional deductible expenses	(4)	(1)	(4)
Change in unrecognized tax benefits	2	1
Impact of Tax Reform			68
Impact of stock compensation shortfall		5	3
Repatriation of foreign earnings			3
Other items, net		3	(3)
Income tax expense	$ 47	$ 59	$ 153