Additional Balance Sheet and Cash Flow Information (Reconciliation Of Net Income To Net Cash Used By Operating Activities) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2017	Sep. 25, 2016	Sep. 24, 2017	Sep. 25, 2016
Cash flows from operating activities:
Net income	$ 68,209	$ 114,065	$ 513,445	$ 644,985
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangibles			163,974	154,565
Amortization of deferred loan origination costs			62,052	65,445
Amortization of financing origination fees			6,112	7,212
Pension and Other Postretirement Benefits Cost (Reversal of Cost)			22,427	28,508
Employee benefit plan contributions and payments			(43,060)	(47,658)
Stock compensation expense			25,581	24,909
Net change in wholesale finance receivables related to sales			36,678	(169,599)
Provision for credit losses	$ 29,253	$ 36,543	99,059	97,127
Gain on off-balance sheet asset-backed securitization			0	(9,269)
Gain (Loss) on Extinguishment of Debt			0	118
Deferred income taxes			(5,151)	(11,261)
Other, net			(11,122)	(23,270)
Changes in current assets and liabilities:
Accounts receivable, net			(29,167)	(86,796)
Finance receivables - accrued interest and other			317	364
Inventories			50,016	173,975
Accounts payable and accrued liabilities			88,758	97,190
Derivative instruments			2,752	(1,992)
Other			(33,596)	(16,744)
Total adjustments			435,630	282,824
Net cash provided by operating activities			$ 949,075	$ 927,809