CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue	$ 7,830,436	$ 6,794,342	$ 6,956,311
Cost of goods and services	4,940,059	4,322,373	4,388,167
Gross profit	2,890,377	2,471,969	2,568,144
Selling, general and administrative expenses	1,975,932	1,757,523	1,647,382
Operating earnings	914,445	714,446	920,762
Interest expense	145,208	136,401	131,676
Interest income	(8,502)	(6,759)	(4,419)
Gain on sale of businesses	(203,138)	(96,598)	0
Other expense (income), net	7,034	(7,930)	(7,105)
Earnings before provision for income taxes and discontinued operations	973,843	689,332	800,610
Provision for income taxes	162,178	180,440	204,729
Earnings from continuing operations	811,665	508,892	595,881
Earnings from discontinued operations, net	0	0	273,948
Net earnings	$ 811,665	$ 508,892	$ 869,829
Earnings per share from continuing operations [Abstract]
Earnings from continuing operations (in dollars per basic share)	$ 5.21	$ 3.28	$ 3.78
Earnings from continuing operations (in dollars per diluted share)	5.15	3.25	3.74
Earnings per share from discontinued operations [Abstract]
Earnings from discontinued operations, net (in dollars per basic share)	0.00	0.00	1.74
Earnings (loss) from discontinued operations, net (in dollars per diluted share)	0.00	0.00	1.72
Net earnings per share [Abstract]
Net earnings (in dollars per basic share)	5.21	3.28	5.52
Net earnings (in dollars per diluted share)	$ 5.15	$ 3.25	$ 5.46
Weighted average shares outstanding - basic (in shares)	155,685,000	155,231,000	157,619,000
Weighted average shares outstanding - diluted (in shares)	157,744,000	156,636,000	159,172,000
Dividends paid per common share (in dollars per share)	$ 1.82	$ 1.72	$ 1.64