Changes in Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Balance at beginning of period	$ 3,019,972	$ 2,633,458	$ 2,751,363	$ 2,537,650
Unrecognized gain on interest rate swaps	1,554	2,445	14,238	2,445
Balance at end of period	3,146,725	2,745,184	3,146,725	2,745,184
Incremental to planned contributions			35,000
Accumulated defined benefit plans adjustment attributable to parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Balance at beginning of period	(77,358)	(116,826)	(103,192)	(119,363)
Total before income tax	584	1,736	35,307	5,883
Income tax provision	149	677	9,038	2,287
Current period comprehensive income, net of tax	435	1,059	26,269	3,596
Balance at end of period	(76,923)	(115,767)	(76,923)	(115,767)
Amortization of prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss, before tax	3	37	8	109
Amortization of net loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss, before tax	581	699	2,119	2,774
Pension remeasurement
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss, before tax	0	0	33,180	0
Settlements
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss, before tax	0	1,000	0	3,000
Accumulated net gain (loss) from cash flow hedges attributable to parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Balance at beginning of period	20,121	0	7,437	0
AOCI attributable to parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Balance at beginning of period	(57,237)	(116,826)	(95,755)	(119,363)
Balance at end of period	(55,248)	(113,322)	(55,248)	(113,322)
Interest Rate Swap | Accumulated net gain (loss) from cash flow hedges attributable to parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Change in fair value of interest rate swaps	3,106	3,091	20,414	3,091
Total before income tax	2,089	4,002	19,137	4,002
Income tax provision	535	1,557	4,899	1,557
Current period comprehensive income, net of tax		2,445		2,445
Unrecognized gain on interest rate swaps	1,554		14,238
Balance at end of period	21,675	2,445	21,675	2,445
Interest Rate Swap | Amounts reclassified to interest expense—net | Accumulated net gain (loss) from cash flow hedges attributable to parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss, before tax	$ (1,017)	$ 911	$ (1,277)	$ 911