CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenues	$ 1,747,403	$ 1,747,775	$ 5,183,168	$ 5,068,356
Cost of goods and services	1,100,883	1,098,582	3,268,583	3,189,202
Gross profit	646,520	649,193	1,914,585	1,879,154
Selling, General and Administrative Expense	426,445	410,040	1,290,246	1,257,027
Operating earnings	220,075	239,153	624,339	622,127
Interest Expense	31,192	35,372	98,957	108,585
Interest Income	(2,060)	(1,759)	(6,680)	(6,669)
Gain on sale of businesses	0	0	0	(90,093)
Other (income) expense, net	(2,073)	(1,236)	(6,641)	(1,407)
Earnings before provision for income taxes	193,016	206,776	538,703	611,711
Provision for income taxes	(35,711)	(47,321)	(105,533)	(154,693)
Earnings from continuing operations	157,305	159,455	433,170	457,018
Earnings (loss) from discontinued operations	0	19,457	(4,472)	58,199
Net earnings	$ 157,305	$ 178,912	$ 428,698	$ 515,217
Earnings per share from continuing operations
Earnings from continuing operations (in dollars per basic share)	$ 1.07	$ 1.02	$ 2.87	$ 2.94
Earnings from continuing operations (in dollars per diluted share)	1.05	1.01	2.82	2.90
Earnings (loss) per share from discontinued operations:
Earnings (loss) per share from discontinued operations (in dollars per basic share)	0.00	0.12	(0.03)	0.37
Earnings (loss) per share from discontinued operations (in dollars per diluted share)	0.00	0.12	(0.03)	0.37
Net earnings per share:
Net earnings (in dollars per basic share)	1.07	1.15	2.84	3.31
Net earnings (in dollars per diluted share)	$ 1.05	$ 1.14	$ 2.79	$ 3.27
Weighted average shares outstanding:
Weighted average shares outstanding - basic	147,344,000	155,757,000	151,177,000	155,668,000
Weighted average shares outstanding - diluted	149,457,000	157,555,000	153,429,000	157,565,000
Dividends paid per common share (in dollars per share)	$ 0.48	$ 0.47	$ 1.42	$ 1.35