Commitments and Contingencies (Product Warranty Liability) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Balance at beginning of year	$ 631.4	$ 619.4
Reductions for payments	(200.8)	(244.4)
Accruals for warranties issued during the period	209.5	242.5
Changes for accruals related to preexisting warranties	(2.8)	15.0
Divestitures	0	(0.3)
Translation	(0.9)	(0.8)
Balance at end of year	$ 636.4	$ 631.4