Use Of Estimates (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accrued Expenses
Employee benefits	$ 187.9	$ 181.3
Unearned revenue	476.4	481.7
Warranty	50.5	46.2	38.9
Other	281.8	268.1
Total	996.6	977.3
Analysis of product warranty accrual
Balance at beginning of period	56.3	47.4	49.0
Acquisitions	3.7	7.7	1.7
Provisions	25.3	21.5	20.3
Usage	(24.7)	(20.3)	(23.6)
Balance at end of period	60.6	56.3	47.4
Less: Current portion of warranty	50.5	46.2	38.9
Non-current portion of warranty	10.1	10.1	8.5
Allowance for Doubtful Accounts
Accounts Receivable Allowances
Balance at beginning of year	41.3	44.3	44.6
Acquisitions	2.8	1.2	1.1
Allowances provided	28.0	17.8	18.9
Write-offs, net of recoveries and credits issued	(21.5)	(22.0)	(20.3)
Balance at end of year	$ 50.6	$ 41.3	$ 44.3