Liabilities for Disposed Operations - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) site	Dec. 31, 2018 USD ($)
Site Contingency [Line Items]
Number of sites | site	20
Environmental loss contingencies term	20 years
Current estimate threshold of total liabilities for disposed operations	10.00%
Maximum
Site Contingency [Line Items]
Loss exposure in excess of accrual	$ 80
Port Angeles, Washington
Site Contingency [Line Items]
Increase (decrease) to liabilities	10	$ 1
Augusta, Georgia
Site Contingency [Line Items]
Increase (decrease) to liabilities	$ 1	(1)
Term for hazardous waste permit	10 years
Baldwin, Florida
Site Contingency [Line Items]
Increase (decrease) to liabilities		$ (5)
Term for hazardous waste permit	10 years