Significant Accounting Policies (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2012 Canadian Pharmacy [Member]
Acquisition Costs	$ (3,830,000)	$ 6,718,000	$ 396,000	$ 10,939,000
Restructuring Charges	11,046,000	0	11,046,000	0
charges relating to business disposition	(7,680,000)	0	(1,777,000)	0
Separation, Benefit Plan Termination and Related Costs	5,500,000	0	21,000,000	0
Debt related costs	0	0	35,092,000	0
Subtotal - Other miscellaneous charges	5,036,000	6,718,000	65,757,000	10,939,000
Goodwill, Impairment Loss					5,900,000
Common Stock Repurchase Program: [Abstract]
Authorized Amount of Repurchase of Outstanding Common Stock	350,000,000
Shares Repurchased (in shares)			3.4
Aggregate Cost of Shares repurchased			111,000,000
cumulative value of shares repurchased through stock repurchase program	352,000,000		352,000,000
cumulative common stock repurchased through repurchase program	12.6		12.6
Remaining Authorized Repurchase Amount			$ 498,000,000