Contingencies and Significant Estimates (Details) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Product liability reserves
Period over which product liability self-insurance retention levels have fluctuated (in years)	10 years
Product liability reserves	$ 22,100,000	$ 21,900,000
Product liability reserves for actual cases	5,300,000	2,800,000
Product liability reserves for claims incurred but not reported	16,800,000	19,100,000
Warranty claims reserves	45,900,000	$ 43,900,000	$ 50,200,000
Maximum
Product liability reserves
Product liability self-insurance maximum retention level for new occurrence	$ 2,000,000.0