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Accounts Receivable, Net (Tables)
12 Months Ended
Dec. 31, 2011
Receivables [Abstract]  
Provision for discounts and doubtful accounts
 201120102009
 $’M$’M$’M
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As at January 1,23.420.820.2
Provision charged to operations240.8178.1127.4
Provision utilization(233.1)(175.5)(118.5)
Reclassification--(8.3)
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As at December 31,31.123.420.8
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