Basis of Interim Financial Statements (Details) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Accrued Expenses
Deferred revenue	$ 339.7		$ 339.7		$ 274.9
Wages, vacations, pensions and other employment costs	305.3		305.3		313.2
Warranties	98.5		98.5		90.0
Postretirement benefits other than pensions	27.8		27.8		29.7
Accrued taxes	41.4		41.4		31.1
Foreign currency hedges	14.9		14.9		22.5
Other	261.0		261.0		280.4
Total	1,088.6		1,088.6		1,041.8
Basis of Interim Financial Statements (Textual) [Abstract]
Effect of change in accounting estimate on income from continuing operations before income tax	41.6	22.2	82.9	71.0
Effect of change in accounting estimate on income from continuing operations after income tax	$ 26.3	$ 13.9	$ 52.5	$ 44.5
Effect of change in accounting estimate on Earnings Per Share	$ 0.21	$ 0.11	$ 0.41	$ 0.35