CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 1,787,582	$ 2,009,575	$ 5,261,711	$ 5,774,781
Cost of goods and services	1,114,974	1,235,153	3,307,376	3,524,400
Gross profit	672,608	774,422	1,954,335	2,250,381
Selling and administrative expenses	395,688	426,160	1,233,017	1,298,388
Operating earnings	276,920	348,262	721,318	951,993
Interest expense, net	31,983	31,231	96,008	95,847
Other (income) expense, net	(367)	(1,032)	(5,810)	(7,074)
Earnings before provision for income taxes and discontinued operations	245,304	318,063	631,120	863,220
Provision for income taxes	58,821	92,380	171,813	256,915
Earnings from continuing operations	186,483	225,683	459,307	606,305
Earnings (loss) from discontinued operations, net	(385)	6,161	268,697	(364)
Net earnings	$ 186,098	$ 231,844	$ 728,004	$ 605,941
Earnings per share from continuing operations [Abstract]
Earnings from continuing operations (in dollars per basic share)	$ 1.20	$ 1.36	$ 2.90	$ 3.62
Earnings from continuing operations (in dollars per diluted share)	1.19	1.34	2.87	3.57
Earnings per share from discontinued operations: [Abstract]
Earnings (loss) from discontinued operations, net (in dollars per basic share)	0.00	0.04	1.70	0.00
Earnings (loss) from discontinued operations, net (in dollars per diluted share)	0.00	0.04	1.68	0.00
Net earnings per share: [Abstract]
Net earnings (in dollars per basic share)	1.20	1.40	4.59	3.62
Net earnings (in dollars per diluted share)	$ 1.19	$ 1.38	$ 4.55	$ 3.57
Weighted average shares outstanding: [Abstract]
Weighted average shares outstanding - basic	155,300	166,021	158,507	167,401
Weighted average shares outstanding - diluted	156,560	168,343	160,112	169,761
Dividends paid per common share (in dollars per share)	$ 0.42	$ 0.40	$ 1.22	$ 1.15