Commitments and Contingencies - Additional Information (Detail)							1 Months Ended					12 Months Ended
	Apr. 26, 2015	Jan. 13, 2014 USD ($)	Dec. 23, 2013 USD ($)	Dec. 21, 2013 USD ($)	Jan. 24, 2013 USD ($)	Aug. 11, 2011 USD ($)	Aug. 31, 2011 USD ($)	Apr. 30, 2011 USD ($) LegalMatter	Jan. 31, 2010 USD ($)	Jun. 30, 2006 Case	Apr. 30, 1999 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Nov. 11, 2014 USD ($)	Jul. 26, 2013 USD ($)	Dec. 31, 2012 USD ($)	Apr. 27, 2009 USD ($)	Jul. 17, 2008 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Operating lease rental expense, net of sublease income												$ 127,100,000	$ 137,400,000	$ 110,100,000
Sublease income												3,000,000	2,900,000	2,700,000
Royalty expense												224,000,000	244,500,000	$ 228,900,000
Liability for reported and incurred but not reported claims												12,300,000	$ 12,900,000
Workers Compensation Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence												1,000,000.0
General And Automobile Liability Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence												500,000.0
Product Liability Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence												2,000,000.0
Self-insured amount per year												2,000,000.0
Property Risks
Commitments and Contingencies Disclosure [Line Items]
Self-insured amount per occurrence												1,000,000.0
MGA
Commitments and Contingencies Disclosure [Line Items]
Number of cases | Case										3
Historical jury verdict																		$ 100,000,000	$ 100,000,000
Number of claimed trade secrets | LegalMatter								26
Compensatory damages awarded by jury								$ 88,500,000
Number of other claimed trade secrets | LegalMatter								88
Reduced compensatory damages awarded by court							$ 85,000,000
Punitive damages awarded							85,000,000
Attorney fees and costs awarded							140,000,000
Compensatory damages, punitive damages, and attorney fees and costs awarded by court							$ 310,000,000
Damages for alleged trade secret misappropriation appealed						$ 170,000,000
Attorney fees and costs appealed						$ 140,000,000
Amount of damages and attorney's fees and costs vacated by the appeals court					$ 172,500,000
Litigation accrual																	$ 138,000,000
Approximate amount of judgment finalized in the District Court, including interest				$ 138,000,000
Payment of judgment			$ 138,000,000
Accrued litigation liability												$ 0
MGA | Minimum
Commitments and Contingencies Disclosure [Line Items]
Alleged trade secrets damages claimed more than		$ 1,000,000,000
Yellowstone
Commitments and Contingencies Disclosure [Line Items]
Alleged loss of profits											$ 1,000,000
Unpaid accounts receivable											4,000,000
Alleged business investments											3,000,000
Initial court appointed expert estimated loss of profits											$ 1,000,000
Court awarded damages from counterclaim									$ 4,000,000
Damages including attorney fees awarded by appeals court including inflation and interest																$ 17,000,000
Counterclaim awarded by Appeals Court															$ 7,500,000	$ 7,500,000
Damages awarded by Appeals Court including inflation and interest															$ 14,500,000
Loss contingency, additional fine on claim, percent	1.00%