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Equity (Tables)
6 Months Ended
Jun. 30, 2012
Equity [Abstract]  
Share repurchases
Share repurchases for the periods ended June 30 were as follows:
 
(in millions, except average price)
Three Months Ended
 
Six Months Ended
 
2012
 
2011
 
2012
 
2011
Total number of shares purchased — 2011 Repurchase Program 1
0.1

 

 
0.9

 

Total number of shares purchased — 2007 Repurchase Program

 
4.4

 

 
7.7

Average price paid per share
$

 
$
40.10

 
$

 
$
38.96

Total cash utilized
$

 
$
177

 
$

 
$
300

 
1 
Represents shares received at the conclusion of the uncollared Accelerated Share Repurchase Agreement described in more detail below.