CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Revenue	$ 2,252,349	$ 2,097,605	$ 6,520,685	$ 6,090,508
Cost of goods and services	1,375,699	1,287,466	4,011,461	3,757,187
Gross profit	876,650	810,139	2,509,224	2,333,321
Selling and administrative expenses	482,284	451,943	1,472,333	1,372,021
Operating earnings	394,366	358,196	1,036,891	961,300
Interest expense, net	30,237	30,399	90,761	90,145
Other expense, net	970	3,706	(1,206)	5,855
Earnings before provision for income taxes and discontinued operations	363,159	324,091	947,336	865,300
Provision for income taxes	99,507	90,761	192,343	240,405
Earnings from continuing operations	263,652	233,330	754,993	624,895
Earnings from discontinued operations, net	5,462	7,716	54,173	26,315
Net earnings	$ 269,114	$ 241,046	$ 809,166	$ 651,210
Earnings per share from continuing operations [Abstract]
Earnings from continuing operations (in dollars per basic share)	$ 1.55	$ 1.28	$ 4.40	$ 3.41
Earnings from continuing operations (in dollars per diluted share)	$ 1.53	$ 1.27	$ 4.34	$ 3.37
Earnings per share from discontinued operations: [Abstract]
Earnings from discontinued operations, net (in dollars per basic share)	$ 0.03	$ 0.04	$ 0.32	$ 0.14
Earnings from discontinued operations, net (in dollars per diluted share)	$ 0.03	$ 0.04	$ 0.31	$ 0.14
Net earnings per share: [Abstract]
Net earnings (in dollars per basic share)	$ 1.58	$ 1.33	$ 4.71	$ 3.56
Net earnings (in dollars per diluted share)	$ 1.56	$ 1.31	$ 4.65	$ 3.51
Dividends paid per common share (in dollars per share)	$ 0.375	$ 0.35	$ 1.075	$ 0.98