Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Line Items]
Federal statutory tax rate		21.00%	21.00%	35.00%
Decrease in effective tax rate on continuing operations		0.07%
Effective income tax rate		23.10%	23.17%	21.11%
Deferred tax assets write-off	$ 21,800		$ 21,300
Percentage of deferred tax assets write-off, other,net			0.66%
Domestic manufacturing deduction				(2.58%)
SAB 118 adjustments			$ 5,800
Tax Reform Act			0.18%	(10.01%)
Net tax benefit related to Tax Reform Act				$ 175,200
Tax credit carryforwards		$ 164,100	$ 16,800
Valuation allowance		192,295	30,104
Non-current deferred tax liabilities included in deferred credits and other liabilities		431,000	332,000
Non-current deferred tax assets included in other assets		0	700
Net federal, state and foreign income taxes paid (refund received)		525,200	561,100	699,800
Current federal and state income taxes receivable		240,800	26,200
Unrecognized tax benefits		50,920	48,605	48,845	$ 44,088
Amount of unrecognized tax benefits affects effective tax rate		50,200	48,000
Estimate of possible decrease in gross uncertain tax positions, exclusive of interest, as a result of the expiration of the statute of limitations		7,300
Expense (benefit) for interest and penalties		700	(4,000)	$ (2,200)
Accrued interest and penalties related to uncertain tax positions		11,900	11,200
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforwards		147,300
Valuation allowance		147,300
State net operating loss carryforwards		$ 681,800	483,000
State and Local Jurisdiction [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Unused net operating loss carryforward expiration year		2039
State and Local Jurisdiction [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Unused net operating loss carryforward expiration year		2020
Foreign Country [Member]
Income Tax Disclosure [Line Items]
Foreign net operating loss carryforwards		$ 149,800	$ 58,600
Foreign net operating loss carryforwards without expiration		19,500
Foreign net operating loss carryforwards with expiration		$ 130,300
Foreign Country [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Unused net operating loss carryforward expiration year		2039
Foreign Country [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Unused net operating loss carryforward expiration year		2025