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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash Reclassified to Assets Held-for-sale $ 0 $ 3.5
Restricted cash balances, beginning of period 249.8 453.5
Restricted cash balances, end of period $ 188.5 $ 360.1