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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2011
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
  Operating
  leases
  $’M
  _____________
2011118.2
2012131.6
2013127.6
2014124.7
2015119.7
2016117.1
Thereafter141.1
 1_____________
 1180.0
  _____________