Segment Information (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Table presents certain data by geographic area
Total sales to external customers	$ 2,959,117	$ 2,942,520	$ 2,874,905	$ 2,779,690	$ 2,670,304	$ 2,659,549	$ 2,596,383	$ 2,402,149	$ 11,556,232	$ 10,328,385	$ 9,012,217
Total long-lived assets	1,171,113				1,019,505				1,171,113	1,019,505
U.S. [Member]
Table presents certain data by geographic area
Total sales to external customers									7,294,981	6,460,046	5,546,551
Total long-lived assets	846,108				738,779				846,108	738,779
Foreign [Member]
Table presents certain data by geographic area
Total sales to external customers									4,261,251	3,868,339	3,465,666
Total long-lived assets	$ 325,005				$ 280,726				$ 325,005	$ 280,726