Derivatives and Fair Value Measurements (Details 4) (Fair value, measurements, nonrecurring [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Level 1 [Member]
Assets
Other current assets - assets held for sale
Level 2 [Member]
Assets
Other current assets - assets held for sale	3.7
Level 3 [Member]
Assets
Other current assets - assets held for sale