Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Translation Adjustment [Member]	Accumulated Defined Benefit Plans Adjustment [Member]
Balance, shares at Dec. 31, 2012		110,834
Common Stock, Value, Issued at Dec. 31, 2012		$ 27,709
Additional Paid in Capital at Dec. 31, 2012			$ 212,940
Treasury Stock, Carrying Basis at Dec. 31, 2012				$ (84,062)
Retained Earnings at Dec. 31, 2012					$ 1,641,027
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2012						$ 21,138
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2012							$ (3,292)
Balance at Dec. 31, 2012	$ 1,815,460
Stockholders' Equity [Roll Forward]
Net Income	371,500				371,500
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(71,282)					(71,282)
Other Comprehensive Income	(70,423)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(859)						859
Restricted stock unit activity	13,509		6,447	7,062
Restricted stock activity	0		(1,264)	1,264
Tax benefits from stock plans	4,279		4,279
Cash dividends	(90,885)				(90,885)
Balance, shares at Dec. 31, 2013		110,834
Common Stock, Value, Issued at Dec. 31, 2013		$ 27,709
Additional Paid in Capital at Dec. 31, 2013			222,402
Treasury Stock, Carrying Basis at Dec. 31, 2013				(75,736)
Retained Earnings at Dec. 31, 2013					1,921,642
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2013						(50,144)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2013							(2,433)
Balance at Dec. 31, 2013	2,043,440
Stockholders' Equity [Roll Forward]
Net Income	428,329				428,329
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(128,666)					(128,666)
Other Comprehensive Income	(130,613)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	1,947						(1,947)
Restricted stock unit activity	(12,509)		(4,311)	(8,198)
Restricted stock activity	0		(1,005)	1,005
Tax benefits from stock plans	3,932		3,932
Cash dividends	(109,742)				(109,742)
Treasury Stock, Value, Acquired, Cost Method	(590,384)			(590,384)
Balance, shares at Dec. 31, 2014		110,834
Common Stock, Value, Issued at Dec. 31, 2014	27,709	$ 27,709
Additional Paid in Capital at Dec. 31, 2014			229,640
Treasury Stock, Carrying Basis at Dec. 31, 2014				(656,917)
Retained Earnings at Dec. 31, 2014	2,240,229				2,240,229
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2014						(178,810)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2014							(4,380)
Balance at Dec. 31, 2014	1,657,471
Stockholders' Equity [Roll Forward]
Net Income	231,011				231,011
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(118,705)					(118,705)
Other Comprehensive Income	(117,174)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(1,531)						1,531
Restricted stock unit activity	(14,092)		(2,164)	(11,928)
Restricted stock activity	0		(1,871)	1,871
Tax benefits from stock plans	247		247
Cash dividends	(106,454)				(106,454)
Treasury Stock, Value, Acquired, Cost Method	(100,459)			(100,459)
Balance, shares at Dec. 31, 2015		110,834
Common Stock, Value, Issued at Dec. 31, 2015	27,709	$ 27,709
Additional Paid in Capital at Dec. 31, 2015			$ 230,180
Treasury Stock, Carrying Basis at Dec. 31, 2015				$ (743,577)
Retained Earnings at Dec. 31, 2015	2,364,786				$ 2,364,786
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2015						$ (297,515)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2015							$ (2,849)
Balance at Dec. 31, 2015	$ 1,578,734