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Comprehensive Earnings (Details) (USD $)
In Thousands
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Comprehensive Earnings [Abstract]    
Net earnings$ 172,280$ 223,759$ 616,954$ 501,756
Foreign currency translation adjustment, net of tax(122,416)110,298(31,472)(61,167)
Other, net of tax(1,907)(845)(1,555)1,104
Comprehensive earnings$ 47,957$ 333,212$ 583,927$ 441,693