Discontinued operations (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2010	Jun. 30, 2010 PMG [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges		$ 28.2
Discontinued operations (Textual) [Abstract]
Pre-tax gain (loss) on sale of business	$ 8.3

Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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- Definition

Pretax provision recognizing a loss for initial, or subsequent, write-down to fair value (less cost to sell) of a disposal group that is classified as a component of the entity, which remains unsold as of the reporting date. May include the recognition of a pretax (gain) for a subsequent increase in fair value (less cost to sell), but not in excess of the cumulative loss previously recognized through write-downs.

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EXPRESS SCRIPTS INC 10-K