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Supplemental Financial Information (Other Current Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2015 | Dec. 31, 2014
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Supplemental Financial Information [Abstract] |  |
Assets held for sale | $ 127.5 | $ 152.4
Inventory | 256.4 | 240.3
Deferred costs | 54.8 | 61.9
Prepaid Expense | 30.0 | 33.8
Prepaid taxes | 70.7 | 90.6
Deferred tax assets | 33.9 | 43.8
Other | 13.3 | 6.6
Other current assets | $ 586.6 | $ 629.4

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