Statements of Consolidated Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net sales	$ 4,773,796	$ 3,735,817	$ 8,738,802	$ 6,497,204
Cost of goods sold	2,735,168	2,001,200	5,013,327	3,419,534
Gross profit	$ 2,038,628	$ 1,734,617	$ 3,725,475	$ 3,077,670
Percent to net sales	42.70%	46.40%	42.60%	47.40%
Selling, general and administrative expenses	$ 1,307,861	$ 1,153,779	$ 2,522,426	$ 2,164,800
Percent to net sales	27.40%	30.90%	28.90%	33.30%
Other general expense - net	$ 26,979	$ 1,775	$ 29,969	$ 2,051
Amortization	73,893	28,918	158,942	35,088
Interest expense	93,507	56,729	185,054	82,424
Interest and net investment income	(559)	(3,091)	(2,177)	(4,371)
Other income - net	(1,139)	(12,496)	(10,411)	(17,930)
Income from continuing operations before income taxes	538,086	509,003	841,672	815,608
Income taxes	134,482	148,352	187,941	215,805
Net income from continuing operations	403,604	360,651	653,731	599,803
Loss from discontinued operations (see Note 4)
Income taxes		41,540		41,540
Net loss from discontinued operations	0	(41,540)	0	(41,540)
Net income	$ 403,604	$ 319,111	$ 653,731	$ 558,263
Basic net income per common share
Continuing operations (in dollars per share)	$ 4.34	$ 3.89	$ 7.02	$ 6.47
Discontinued operations (in dollars per share)	0.00	(0.45)	0.00	(0.45)
Net income per common share (in dollars per share)	4.34	3.44	7.02	6.02
Diluted net income per common share
Continuing operations (in dollars per share)	4.25	3.80	6.86	6.34
Discontinued operations (in dollars per share)	0.00	(0.44)	0.00	(0.44)
Net income per common share (in dollars per share)	$ 4.25	$ 3.36	$ 6.86	$ 5.90
Average shares outstanding - basic (in shares)	92,926,421	92,841,148	93,132,993	92,695,853
Average shares and equivalents outstanding - diluted (in shares)	94,884,187	94,968,636	95,258,956	94,697,439
Comprehensive income	$ 196,810	$ 349,288	$ 496,152	$ 579,378