Commitments and Contingencies - Asbestos Narrative (Details) - Asbestos [Member] $ in Millions	336 Months Ended
	Dec. 31, 2018 USD ($) claimants cases	Dec. 31, 2017 claimants	Dec. 31, 2016 claimants	Dec. 31, 2015 claimants
Loss Contingencies [Line Items]
Number of pending cases | cases	379
Number of pending claims	4,820	5,256	5,339	6,242
Number of pending claims seeking specific amounts of damages	49
Total settlement costs | $	$ 8.9
Percentage of settlement and defense costs covered by insurance	40.00%