Use Of Estimates (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accrued Expenses
Employee benefits	$ 181.8	$ 189.1
Unearned revenue	484.2	481.9
Warranty	46.6	38.9	37.5
Other	269.4	275.1
Total	982.0	985.0
Analysis of product warranty accrual
Balance at beginning of period	47.7	49.2	47.9
Acquisitions	7.7	1.7	3.6
Provisions	21.7	20.5	20.9
Usage	(20.4)	(23.7)	(23.2)
Balance at end of period	56.7	47.7	49.2
Less: Current portion of warranty	46.6	38.9	37.5
Non-current portion of warranty	10.1	8.8	11.7
Allowance for Doubtful Accounts
Accounts Receivable Allowances
Balance at beginning of year	45.6	45.9	48.8
Acquisitions	1.2	1.1	0.2
Allowances provided	17.9	18.9	11.6
Write-offs, net of recoveries and credits issued	(22.2)	(20.3)	(14.7)
Balance at end of year	$ 42.5	$ 45.6	$ 45.9