Segment information (Tables)

12 Months Ended

Dec. 31, 2010

Segment information (Tables) [Abstract]

Reportable Segments Information

(in millions)	PBM		EM		Total
2010
Product revenues:
Network revenues	$	30,147.8	$	—	$	30,147.8
Home delivery and specialty revenues		13,398.2		—		13,398.2
Other revenues		—		1,153.9		1,153.9
Service revenues		260.9		12.4		273.3
Total revenues		43,806.9		1,166.3		44,973.2
Depreciation and amortization expense		236.9		7.8		244.7
Operating income		2,061.5		9.4		2,070.9
Interest income						4.9
Interest expense						(167.1	)
Income before income taxes						1,908.7
Capital expenditures		116.9		3.0		119.9
2009
Product revenues:
Network revenues	$	15,019.3	$	—	$	15,019.3
Home delivery and specialty revenues		8,352.9		—		8,352.9
Other revenues		—		1,073.0		1,073.0
Service revenues		264.7		12.4		277.1
Total revenues		23,636.9		1,085.4		24,722.3
Depreciation and amortization expense		98.3		8.4		106.7
Operating income		1,490.4		7.1		1,497.5
Interest income						5.3
Interest expense						(194.4	)
Income before income taxes						1,308.4
Capital expenditures		145.4		2.1		147.5
2008
Product revenues:
Network revenues	$	13,039.9	$	—	$	13,039.9
Home delivery and specialty revenues		7,436.6		—		7,436.6
Other revenues		—		1,201.2		1,201.2
Service revenues		250.4		13.1		263.5
Total revenues		20,726.9		1,214.3		21,941.2
Depreciation and amortization expense		86.1		8.0		94.1
Operating income		1,272.6		1.7		1,274.3
Non-operating charges, net						(2.0	)
Undistributed loss from joint venture						(0.3	)
Interest income						13.0
Interest expense						(77.6	)
Income before income taxes						1,207.4
Capital expenditures		83.7		0.1		83.8

Balance sheet information about reportable segments

(in millions)	PBM		EM		DISC OP		Total
Total Assets
As of December 31, 2010	$	10,155.1	$	402.7	$	—	$	10,557.8
As of December 31, 2009	$	11,629.1	$	265.7	$	36.4	$	11,931.2