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Contingencies (Warranty Accrual) (Details) (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Contingencies 
Balance, December 31, 2010$ 130.1
Accruals for warranties issued during the period83.0
Acquisitions21.3
Settlements made(93.0)
Balance, September 30, 2011$ 141.4