Segment Information (Details Textuals) (USD $) In Millions	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Segment Information (Textuals)
Percentage of revenue derived from services for Distributions Solutions segment	less than 2% of Distributions Solutions total revenues	less than 2% of Distributions Solutions total revenues
Share of a settlement of an antitrust class action lawsuit		$ 51