Schedule II (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Provision For Losses [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 8.3	$ 8.8	$ 8.9
Additions charged to earnings	4.4	6.5	6.8
Deductions	(5.8)	(7.1)	(6.4)
Divestitures/Acquisitions	(0.2)	0.1	(0.5)
Balance at end of year	6.7	8.3	8.8
Provision For Discounts And Warranties [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	31.1	33.0	36.9
Additions charged to earnings	159.6	168.0	171.2
Deductions	(161.7)	(169.9)	(175.1)
Divestitures/Acquisitions	(0.1)
Balance at end of year	$ 28.9	$ 31.1	$ 33.0