XML 33 R22.htm IDEA: XBRL DOCUMENT v2.4.0.6
Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2013
Commitments and Contingencies Disclosure [Abstract]  
Personal Injury Liability Activity
The personal injury liability activity was as follows (in millions):
 
Three Months Ended March 31,
 
2013
 
2012
Balance at beginning of year
$
34.4

 
$
40.1

Accruals
2.2

 
2.5

Change in estimate
(0.4
)
 
—

Payments
(2.8
)
 
(0.8
)
Balance at end of period
$
33.4

 
$
41.8