Commitments and Contingencies - Environmental (Details)	1 Months Ended					3 Months Ended			6 Months Ended
	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Jul. 31, 2018 USD ($)	Feb. 28, 2018 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2020 USD ($) lawsuit item person facility defendant subsidiary company
Environmental Matters - Remediation
Loss contingencies
Accrued loss contingency reserve | $									$ 20,000,000
Number of years remediation payments expected to be paid for applicable sites									20 years
Environmental Matters - Other
Loss contingencies
Accrued loss contingency reserve | $									$ 0
Insurance receivables | $									$ 8,000,000
Environmental Matters - Regulatory Activities
Loss contingencies
Number of years after phase-out decision in May 2000 that the Company stopped manufacturing and using vast majority of perfluorooctanyl compounds									2 years
Amount of PFOA and PFOS found in drinking water, either individually or combined, that are allowed per the EPA's announced lifetime health advisory levels in parts per trillion | item									70
Amount of PFOA in drinking water allowed per provisional health advisories in parts per trillion (superseded) | item									400
Amount of PFOS in drinking water allowed per provisional health advisories in parts per trillion (superseded) | item									200
Number of PFCs the EPA has required to have public water system suppliers monitor | item									6
Number of PFAS the EPA has required to have public water system suppliers monitor | item									6
Number compounds EPA asked for public comment on draft toxicity assessments for PFAS compounds, including PFBS | item									2
Number of public water supplies the EPA reported results | item									4,920
Number of water supplies that reported above advisory level with PFOA | item									13
Number of water supplies that reported above advisory level with PFOS | item									46
Number of water supplies that reported above advisory level with both PFOA and PFOS under technical advisory issued by EPA in September 2016 | item									65
Environmental Matters - Regulatory Activities | Minimum
Loss contingencies
Number of water supply samples used to test for PFOA and PFOS under the EPA lifetime health advisory program | item									1
Environmental Matters - Regulatory Activities | Minnesota Department of Health
Loss contingencies
Amount of PFOA in drinking water allowed per Minnesota Department of Health in parts per trillion | item									35
Amount of PFOS in drinking water allowed per Minnesota Department of Health in parts per trillion | item									27
Additional amounts of PFOS in drinking water allowed per Minnesota Department of Health in parts per trillion | item									15
Amount of PFHxS in drinking water allowed per Minnesota Department of Health in parts per trillion | item									47
Amount of PFBS in drinking water allowed per Minnesota Department of Health in parts per billion | item									2
Environmental Matters - Litigation | U.S. District Court for the Northern District of Alabama
Loss contingencies
Number of plaintiffs | person									59
Number of additional defendants | person									24
Environmental Matters - Litigation | Alabama
Loss contingencies
Litigation settlement awarded | $			$ 35,000,000
Number of local water works for whom the water authority supplies water | item									5
Environmental Matters - Litigation | Decatur, Alabama
Loss contingencies
Number of closed municipal landfills | item									3
Number of putative class action and other lawsuits									2
Environmental Matters - Litigation | Minnesota
Loss contingencies
Litigation settlement awarded | $								$ 897,000,000
Settlement amount paid | $					$ 850,000,000
Environmental Matters - Litigation | Lake Elmo, Minnesota | Maximum
Loss contingencies
Settlement amount paid | $			$ 5,000,000
Environmental Matters - Litigation | New Jersey
Loss contingencies
Number of lawsuits filed									2
Number of additional new claims filed									2
Loss Contingency Parties Jointly and Severally Liable in Litigation									six
Environmental Matters - Litigation | Salem County, New Jersey
Loss contingencies
Number of facilities related to the manufacture and disposal of PFAS | facility									2
Environmental Matters - Litigation | State court in New York
Loss contingencies
Number of lawsuits filed									4
Environmental Matters - Litigation | State Court of Lawrence County, Alabama
Loss contingencies
Number of plaintiffs | person									200
Environmental Matters - Litigation | New Hampshire
Loss contingencies
Number of lawsuits filed									2
Loss Contingency Parties Jointly and Severally Liable in Litigation									seven
Environmental Matters - Litigation | Vermont
Loss contingencies
Number of lawsuits filed									2
Loss Contingency Parties Jointly and Severally Liable in Litigation									ten
Environmental Matters - Other Environmental Litigation | New Jersey
Loss contingencies
Number of unnamed defendant | defendant									120
Approximate number of miles of a river seeking to be cleaned | item									8
The value the award the plaintiff seeks | $				$ 165,000,000
Number of chemicals of concern in the sediment | item									8
Number of commercial drum conditioning facilities | item									2
Environmental Matters - Aqueous Film Forming Foam Litigation
Loss contingencies
Number of lawsuits filed									8
Number of putative class action and other lawsuits | item									730
Number of class action lawsuits									25
Number of cases filed by current or former firefighters									249
Environmental Matters - Aqueous Film Forming Foam Litigation | U.S. Judicial Panel on Multidistrict Litigation (MDL)
Loss contingencies
Number of lawsuits filed									715
Number of putative class action and other lawsuits									725
Environmental Matters - Aqueous Film Forming Foam Litigation | Various state courts
Loss contingencies
Number of lawsuits filed									9
Number of lawsuits pending									5
Number of cases stayed									5
Environmental Matters - Aqueous Film Forming Foam Litigation | State court in Wisconsin
Loss contingencies
Number of subsidiaries of plaintiff | subsidiary									2
Environmental Matters - Aqueous Film Forming Foam Litigation | Federal court
Loss contingencies
Number of lawsuits pending									2
Environmental Matters - Other PFAS-related Environmental Litigation
Loss contingencies
Accrued loss contingency reserve | $									$ 382,000,000
Increase (decrease) accrued loss contingency reserve | $							$ 235,000,000		43,000,000
Litigation payments | $									$ 106,000,000
Number of landfills tested by the entity for environmental matters and litigation related to historical PFAS manufacturing operations | item									4
Charge for environmental resolutions | $						$ 214,000,000
Environmental Matters - Other PFAS-related Environmental Litigation | U.S. District Court of New York State
Loss contingencies
Number of lawsuits filed									40
Number of additional new claims filed									4
Number of putative class action and other lawsuits									1
Environmental Matters - Other PFAS-related Environmental Litigation | U.S. District Court of Eastern District of New York
Loss contingencies
Number of lawsuits pending									8
Environmental Matters - Other PFAS-related Environmental Litigation | Alabama
Loss contingencies
Number of perfluorinated materials (FBSA and FBSEE) the company cannot release into "the waters of the United States." | item									2
Number of putative class action and other lawsuits									4
Environmental Matters - Other PFAS-related Environmental Litigation | Georgia
Loss contingencies
Number of putative class action and other lawsuits									1
Environmental Matters - Other PFAS-related Environmental Litigation | Cities located downstream along the Coosa River
Loss contingencies
Number of putative class action and other lawsuits									3
Environmental Matters - Other PFAS-related Environmental Litigation | Michigan
Loss contingencies
Number of plaintiffs | person									1
Settlement amount paid | $	$ 55,000,000	$ 70,000,000
Number of lawsuits filed									267
Number of federal bellwether cases with trial-ready dates set									4
Number of federal bellwether cases the court issued the first round of dispositive motion rulings									2
Total number of federal bellwether cases									3
Number of putative class action and other lawsuits									1
Number of companies involved in agreement | company									2
Environmental Matters - Other PFAS-related Environmental Litigation | Delaware.
Loss contingencies
Number of putative class action and other lawsuits									1