XML 100 R74.htm IDEA: XBRL DOCUMENT

Segment information (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total assets	$ 15,607.0	$ 10,557.8
PBM [Member]
Segment Reporting Information [Line Items]
Total assets	15,149.9	10,155.1
EM [Member]
Segment Reporting Information [Line Items]
Total assets	$ 457.1	$ 402.7

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References+ Details