Operations and Summary of Significant Accounting Policies - Accrued Expense and Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Reserve for volume discounts and sales incentives	$ 407.3	$ 443.3
Warranty reserves	223.1	195.2
Accrued employee compensation and benefits	234.0	213.7
Accrued taxes	113.5	87.3
Other	182.9	167.4
Accrued expenses	1,160.8	1,106.9
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty reserves, beginning of period	230.3	284.6	$ 294.9
Acquisitions	3.7	0.2	0.5
Accruals for warranties issued during the year	214.6	152.6	214.1
Settlements made (in cash or in kind) during the year	(188.7)	(186.2)	(205.5)
Foreign currency translation	(4.3)	(20.9)	(19.4)
Warranty reserves, end of period	$ 255.6	230.3	$ 284.6
Minimum product warranty period	1 year
Maximum product warranty period	4 years
Warranty reserves included in other noncurrent liabilities	$ 32.5	$ 35.1