Pension Plans and Other Retirement Benefits - Additional Information (Detail) - USD ($) $ in Thousands				1 Months Ended	3 Months Ended		4 Months Ended		8 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2018	Oct. 21, 2016	Sep. 30, 2016	Dec. 31, 2017	Nov. 03, 2018	Jan. 28, 2017	Feb. 02, 2019	Jan. 28, 2017	Sep. 30, 2018	Sep. 30, 2016	Nov. 03, 2018	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017	Dec. 31, 2016
Pension Plans and Other Retirement Benefits [Line Items]
Net accrued liability recognized in balance sheet							$ 72,600					$ 72,600	$ 77,600
Pension plans and other retirement benefits, current liability							4,700					4,700	2,400
Pension plans and other retirement benefits, long-term liability							92,100					92,100	88,600
Pension plans and other retirement benefits, long-term asset							24,200					24,200	13,400
Employer contribution												$ 106,200	105,000	$ 54,600
Minimum percentage of pension liability												80.00%
Anticipated employer's contribution to fund current benefit and expense payments under the unfunded plan in fiscal 2019							$ 4,800					$ 4,800
Pension settlement charge						$ 31,173						$ 36,122	$ 0	31,173
Defined benefit plan, benefits paid		$ 103,200
Pension expense discount rate			4.80%										3.80%
Expected rate of return on plan assets			6.50%										6.00%
Percentage of employees contribution from eligible pay, maximum												50.00%
Rate of eligible pay for matching employee contributions												5.00%
Minimum range of rates for matching employee contributions												25.00%
Maximum range of rates for matching employee contributions												75.00%
Rate of defined pension plan							25.00%					25.00%
Percentage of plan assets representing stock funds				3.90%
Multiemployer Pension Plans
Pension Plans and Other Retirement Benefits [Line Items]
Pension contribution to National Retirement Fund												$ 18,500	$ 16,300	14,500
Percentage of pension contribution															5.00%
Retirement/Deferred Savings Plan
Pension Plans and Other Retirement Benefits [Line Items]
Employer contribution												$ 15,300	12,600	10,200
Funded Plan
Pension Plans and Other Retirement Benefits [Line Items]
Excess percentage of projected benefit obligation for amortization of unrecognized gains and losses												10.00%
Deferral Rate
Pension Plans and Other Retirement Benefits [Line Items]
Rate of defined pension plan							2.00%					2.00%
Employee Savings Plan
Pension Plans and Other Retirement Benefits [Line Items]
Total cost to employer												$ 60,800	54,500	45,600
Nonqualified Savings Plan
Pension Plans and Other Retirement Benefits [Line Items]
Employer contribution												6,000	6,300	5,800
Funded Plan
Pension Plans and Other Retirement Benefits [Line Items]
Net accrued liability recognized in balance sheet							$ 24,165					24,165	13,442
Estimated amortization of net actuarial loss for 2019							$ 17,700					17,700
Estimated amortization of prior service cost for 2019												400
Employer contribution												100,000	100,000
Transferred assets to plan											$ (207,400)
Pension settlement charge					$ 36,122							36,122	0	$ 31,173
Defined benefit plan, benefits paid												$ 33,226	$ 30,993
Pension expense discount rate												4.00%	4.00%	4.00%
Expected rate of return on plan assets	6.00%						6.00%	6.00%	6.00%	6.50%	6.00%		6.00%
Unfunded Plan
Pension Plans and Other Retirement Benefits [Line Items]
Net accrued liability recognized in balance sheet							$ (96,759)					$ (96,759)	$ (91,047)
Estimated amortization of net actuarial loss for 2019							$ 3,700					3,700
Employer contribution												6,234	5,046
Defined benefit plan, benefits paid												$ 6,234	$ 5,046
Pension expense discount rate												6.00%	6.00%	6.00%