CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenue	$ 6,992,118	$ 6,820,886	$ 6,043,224
Cost of goods and services	4,432,562	4,291,839	3,815,672
Gross profit	2,559,556	2,529,047	2,227,552
Selling, general and administrative expenses	1,716,444	1,722,161	1,518,580
Operating earnings	843,112	806,886	708,972
Interest expense	130,972	144,948	135,969
Interest income	(8,881)	(8,491)	(6,752)
Gain on sale of businesses	0	(203,135)	(96,598)
Other expense (income), net	(4,357)	(2,251)	(8,291)
Earnings before provision for income taxes and discontinued operations	725,378	875,815	684,644
Provision for income taxes	134,233	129,152	182,516
Earnings from continuing operations	591,145	746,663	502,128
(Loss) earnings from discontinued operations, net	(20,878)	65,002	6,764
Net earnings	$ 570,267	$ 811,665	$ 508,892
Earnings per share from continuing operations [Abstract]
Earnings from continuing operations (in dollars per basic share)	$ 3.94	$ 4.80	$ 3.23
Earnings from continuing operations (in dollars per diluted share)	3.89	4.73	3.21
Earnings per share from discontinued operations [Abstract]
Earnings from discontinued operations, net (in dollars per basic share)	(0.14)	0.42	0.04
Earnings (loss) from discontinued operations, net (in dollars per diluted share)	(0.14)	0.41	0.04
Net earnings per share [Abstract]
Net earnings (in dollars per basic share)	3.80	5.21	3.28
Net earnings (in dollars per diluted share)	$ 3.75	$ 5.15	$ 3.25
Weighted average shares outstanding - basic (in shares)	149,874,000	155,685,000	155,231,000
Weighted average shares outstanding - diluted (in shares)	152,133,000	157,744,000	156,636,000