Commitments and Contingencies - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Product Warranty Liability [Line Items]
Guarantor obligations, expiration term	P2Y
Performance Guarantee
Product Warranty Liability [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 194.1
Financial Guarantee
Product Warranty Liability [Line Items]
Guarantor obligations, maximum exposure, undiscounted	4.2
Customers Financing Arrangements Guarantee
Product Warranty Liability [Line Items]
Guarantor obligations, maximum exposure, undiscounted	7.1
Guarantor obligations, maximum exposure, undiscounted, net	$ 0.4
Minimum
Product Warranty Liability [Line Items]
Guarantor obligations, amount recoverable from third-parties (as a percent)	75.00%
Maximum
Product Warranty Liability [Line Items]
Guarantor obligations, amount recoverable from third-parties (as a percent)	95.00%