Revenue from Contracts with Customers - Narrative (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Revenue recognition [Line Items]
Inventories, net	$ 1,181,100,000		$ 1,155,300,000
Adjustment from current cost to LIFO cost basis	(45,600,000)		(33,600,000)
Sales	955,500,000	$ 1,004,800,000
Cost of sales	820,700,000	873,700,000
Short-term contract assets	43,500,000	48,700,000	38,500,000	$ 51,200,000
Long-term contract assets	0	100,000	100,000	100,000
Other current liabilities	209,600,000		237,800,000
Other long-term liabilities	163,500,000		160,800,000
Short-term contract liabilities	114,300,000	77,900,000	78,700,000	71,400,000
Long-term contract liabilities	$ 29,700,000	7,300,000	25,900,000	$ 7,300,000
Number of business segments | segment	2
Revenue, Performance Obligation [Abstract]
Confirmed order backlog	$ 2,120,000,000	2,590,000,000
Confirmed orders with current performance obligations	0.80
Accounts receivable with customers	597,800,000		558,700,000
Contract costs for obtaining and fulfilling contracts	6,300,000		$ 6,500,000
Amortization of contract costs	$ 300,000	$ 300,000