Reconciliation Of Income Taxes at Federal Statutory Rate to Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal tax computed at the statutory rate	$ 33	$ 105	$ 160
State taxes, net of Federal benefit	10	12	(20)
Foreign income taxed at rates other than Federal	5	2
Decrease in valuation allowance	(3)	(36)	(349)
Non-deductible Merger expenses		3
Other non-deductible expenses and settlements	10		3
Tax basis differences in Investment in Subs	(4)
Non-taxable income and additional deductible expenses	(1)	(4)	(13)
Change in unrecognized tax benefits	1		(3)
Impact of Tax Reform		68
Impact of stock compensation shortfall	5	3
Repatriation of foreign earnings		3
Subpart F and dividend income, net of foreign tax credits			2
Other items, net	3	(3)
Income tax expense (benefit)	$ 59	$ 153	$ (220)