Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effective tax rate	14.90%			26.00%		19.90%	26.30%
Favorable tax benefit						$ 17,400
Income taxes							$ 41,540
Provisional reduction of income taxes								$ 607,900
Reduction of deferred tax liabilities								560,200
Remeasurement of U.S. deferred tax liabilities on unremitted foreign earnings								47,700
Unrecognized tax benefits			$ 59,000					59,000
Unrecognized tax benefits adjusted			49,500					49,500
Amount of unrecognized tax benefits where significant change is reasonably possible			5,200					5,200
Additional unrecognized tax benefits added					$ 24,000
Accrued income tax interest and penalties			14,600					$ 14,600
Additional tax-related interest and penalties added		$ 8,400			$ 8,400
Income tax refund receivable	$ 7,500					$ 7,500
Valspar Corporation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reversal of income tax benefits		$ 27,500	$ 27,500