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Accounts Receivable, Net (Tables)
3 Months Ended
Mar. 31, 2013
Receivables [Abstract]  
Provision for discounts and doubtful accounts
 20132012
 $’M$’M
 __________________________
As at January 1,41.731.1
Provision charged to operations76.365.4
Provision utilization(73.3)(63.8)
 __________________________
As at March 31,44.732.7
 __________________________