Commitments and Contingencies - Environmental (Details)	1 Months Ended						3 Months Ended			6 Months Ended
	Jul. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	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 ($)	Jun. 30, 2021 USD ($) lawsuit item company subsidiary person facility individual defendant
Environmental Matters - Remediation
Loss contingencies
Accrued loss contingency reserve | $										$ 24,000,000
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Amount of PFOA in drinking water allowed per provisional health advisories in parts per trillion (superseded) | item										400
Amount of PFOS in drinking water allowed per provisional health advisories in parts per trillion (superseded) | item										200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 PFAS EPA proposed in fifth version of unregulated contaminant monitoring rule | item										29
Number of PFAS the EPA has required to have public water system suppliers monitor | item										6
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
Environmental Matters - Regulatory Activities | Minimum
Loss contingencies
Number of PFAS EPA has added to list of substances that must be included in TRI reports | item										170
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 | Massachusetts
Loss contingencies
Number of combined PFAS compounds detailed in published final regulations establishing a drinking water standard | item										6
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										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 - Regulatory Activities | Vermont
Loss contingencies
Number of other perfluorinated compounds in drinking water standards | item										3
Environmental Matters - Litigation | U.S. District Court for the Northern District of Alabama
Loss contingencies
Number of plaintiffs | individual										55
Number of additional plaintiffs | individual										37
Number of plaintiffs dismissed | individual										5
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
Number of recommended options for utilizing the Water Quality and Sustainability Fund seeking public comment | item										3
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
Number of additional defendants										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 | Michigan
Loss contingencies
Number of lawsuits filed										2
Environmental Matters - Litigation | Federal court of Michigan
Loss contingencies
Number of lawsuits filed										1
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 | individual										4,000
Environmental Matters - Litigation | State Court of Lawrence County, Alabama | Minimum
Loss contingencies
Number of plaintiffs | individual										200
Environmental Matters - Litigation | New Hampshire
Loss contingencies
Number of lawsuits filed										2
Number of additional defendants										seven
Environmental Matters - Litigation | Vermont
Loss contingencies
Number of lawsuits filed										2
Number of additional defendants										ten
Environmental Matters - Aqueous Film Forming Foam Litigation
Loss contingencies
Number of putative class action and other lawsuits | item										1,274
Number of class action lawsuits										26
Environmental Matters - Aqueous Film Forming Foam Litigation | U.S. Judicial Panel on Multidistrict Litigation (MDL)
Loss contingencies
Number of water supplier cases										10
Environmental Matters - Aqueous Film Forming Foam Litigation | Various state courts
Loss contingencies
Number of lawsuits filed										8
Number of lawsuits pending										5
Number of lawsuits served										8
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
Increase (decrease) accrued loss contingency reserve | $										$ 112,000,000
Litigation payments | $										$ 35,000,000
Environmental Matters - Other PFAS-related Environmental Litigation | U.S. District Court of New York State
Loss contingencies
Number of plaintiffs | individual										24
Number of additional plaintiffs | individual										8
Settlement amount paid | $	$ 65,000,000
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										12
Environmental Matters - Other PFAS-related Environmental Litigation | State court of California
Loss contingencies
Number of local water providers | facility										10
Environmental Matters - Other PFAS-related Environmental Litigation | Decatur, Alabama
Loss contingencies
Number of perfluorinated materials (FBSA and FBSEE) the company cannot release into "the waters of the United States." | item										2
Environmental Matters - Other PFAS-related Environmental Litigation | Alabama and Georgia
Loss contingencies
Number of putative class action and other lawsuits										3
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 | New Jersey
Loss contingencies
Number of lawsuits filed										12
Number of lawsuits seeking medical monitoring and damages										2
Number of cases the Company has filed answers										7
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 claims with summary judgment										1
Number of lawsuits filed										280
Number of federal bellwether cases with trial-ready dates set										3
Number of federal bellwether cases the court issued the first round of dispositive motion rulings										2
Total number of federal bellwether cases										5
Remaining number of federal bellwether cases										2
Additional number of federal bellwether cases										8
Number of putative class action and other lawsuits										1
Number of companies involved in agreement | company										2
Environmental Matters - Other PFAS-related Environmental Litigation | Federal court
Loss contingencies
Number of putative class action and other lawsuits										2
Environmental Matters - Other PFAS-related Environmental Litigation | Delaware.
Loss contingencies
Number of putative class action and other lawsuits										1
Environmental Matters - Other Environmental Litigation
Loss contingencies
Accrued loss contingency reserve | $										$ 493,000,000
Charge for environmental resolutions | $							$ 214,000,000
Environmental Matters - Other Environmental Litigation | Alabama
Loss contingencies
Increase (decrease) accrued loss contingency reserve | $								$ 235,000,000
Environmental Matters - Other Environmental Litigation | New Jersey
Loss contingencies
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 - Other Environmental Litigation | New Jersey | Minimum
Loss contingencies
Number of unnamed defendant | defendant										120