CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenue	$ 1,707,763	$ 1,787,582	$ 5,016,381	$ 5,261,711
Cost of goods and services	1,075,975	1,114,974	3,164,116	3,307,376
Gross profit	631,788	672,608	1,852,265	1,954,335
Selling and administrative expenses	421,042	395,688	1,301,901	1,233,017
Operating earnings	210,746	276,920	550,364	721,318
Interest expense, net	32,994	31,983	96,865	96,008
Other income, net	(3,424)	(367)	(19,800)	(5,810)
Earnings before provision for income taxes and discontinued operations	181,176	245,304	473,299	631,120
Provision for income taxes	51,092	58,821	125,569	171,813
Earnings from continuing operations	130,084	186,483	347,730	459,307
(Losses) earnings from discontinued operations, net	0	(385)	0	268,697
Net earnings	$ 130,084	$ 186,098	$ 347,730	$ 728,004
Earnings per share from continuing operations [Abstract]
Earnings from continuing operations (in dollars per basic share)	$ 0.84	$ 1.20	$ 2.24	$ 2.90
Earnings from continuing operations (in dollars per diluted share)	0.83	1.19	2.22	2.87
Earnings per share from discontinued operations: [Abstract]
Earnings from discontinued operations, net (in dollars per basic share)	0.00	0.00	0.00	1.70
Earnings from discontinued operations, net (in dollars per diluted share)	0.00	0.00	0.00	1.68
Net earnings per share: [Abstract]
Net earnings (in dollars per basic share)	0.84	1.20	2.24	4.59
Net earnings (in dollars per diluted share)	$ 0.83	$ 1.19	$ 2.22	$ 4.55
Weighted average shares outstanding: [Abstract]
Weighted average shares outstanding - basic	155,300,000	155,300,000	155,182,000	158,507,000
Weighted average shares outstanding - diluted	156,798,000	156,560,000	156,562,000	160,112,000
Dividends paid per common share (in dollars per share)	$ 0.44	$ 0.42	$ 1.28	$ 1.22