Product Warranty (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Warranty reserve activity:
Balance at beginning of period	$ 303.9	$ 293.8	$ 294.9	$ 256.9
Acquisition	0.5	0	0.5	0
Accruals for warranties issued during the period	51.0	40.6	149.9	150.1
Settlements made (in cash or in kind) during the period	(59.3)	(44.5)	(150.1)	(111.6)
Foreign currency translation	(13.7)	7.3	(12.8)	1.8
Balance at end of period	282.4	297.2	282.4	297.2
Product warranty period, minimum, years			1 year
Product warranty period, maximum, years			4 years
Product warranty accrual, current	241.0		241.0		255.9
Product warranty accrual, noncurrent	$ 41.4		$ 41.4		$ 39.0