CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (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]
Revenue	$ 1,798,094	$ 1,737,371	$ 3,435,765	$ 3,320,581
Cost of goods and services	1,132,858	1,083,263	2,167,700	2,090,620
Gross profit	665,236	654,108	1,268,065	1,229,961
Selling, General and Administrative Expense	428,775	421,270	863,801	846,987
Operating earnings	236,461	232,838	404,264	382,974
Interest Expense	32,125	36,854	67,765	73,213
Interest Income	(2,563)	(2,335)	(4,620)	(4,910)
Gain on sale of businesses	0	0	0	(90,093)
Other expense (income), net	(4,538)	259	(4,568)	(171)
Earnings before provision for income taxes	211,437	198,060	345,687	404,935
Provision for income taxes	(44,981)	(55,585)	(69,822)	(107,372)
Earnings from continuing operations	166,456	142,475	275,865	297,563
(Loss) earnings from discontinued operations	(26,497)	21,583	(4,472)	38,742
Net earnings	$ 139,959	$ 164,058	$ 271,393	$ 336,305
Earnings per share from continuing operations [Abstract]
Earnings from continuing operations (in dollars per basic share)	$ 1.10	$ 0.92	$ 1.80	$ 1.91
Earnings from continuing operations (in dollars per diluted share)	1.08	0.90	1.77	1.89
(Loss) earnings per share from discontinued operations: [Abstract]
(Loss) earnings per share from discontinued operations (in dollars per basic share)	(0.17)	0.14	(0.03)	0.25
(Loss) earnings per share from discontinued operations (in dollars per diluted share)	(0.17)	0.14	(0.03)	0.25
Net earnings per share: [Abstract]
Net earnings (in dollars per basic share)	0.92	1.05	1.77	2.16
Net earnings (in dollars per diluted share)	$ 0.91	$ 1.04	$ 1.74	$ 2.14
Weighted average shares outstanding: [Abstract]
Weighted average shares outstanding - basic	151,744,000	155,703,000	153,124,000	155,622,000
Weighted average shares outstanding - diluted	153,938,000	157,513,000	155,573,000	157,457,000
Dividends paid per common share (in dollars per share)	$ 0.47	$ 0.44	$ 0.94	$ 0.88