Commitments and Contingencies - Environmental (Details) € in Millions	1 Months Ended																				3 Months Ended	9 Months Ended
	Oct. 31, 2021 USD ($) bill lawsuit	Sep. 30, 2021 USD ($) lawsuit	Jul. 31, 2021 USD ($)	Feb. 28, 2021 lawsuit	Dec. 31, 2020 waterProvider	Aug. 31, 2020 lawsuit	Jun. 30, 2020 lawsuit	Apr. 30, 2020 subsidiary	Mar. 31, 2020 USD ($)	Feb. 29, 2020 company	Dec. 31, 2019 USD ($)	Jul. 31, 2019 closedMunicipalLandfill	Jun. 30, 2019 lawsuit party	May 31, 2019 party lawsuit	Apr. 30, 2019 USD ($)	Mar. 31, 2019 lawsuit facility	Jul. 31, 2018 USD ($)	Feb. 28, 2018 USD ($)	Aug. 31, 2016 individual	Oct. 31, 2015 localWaterWork	Mar. 31, 2018 USD ($)	Sep. 30, 2021 USD ($) lawsuit individual facility perfluorinatedMaterial chemical recommendedOption defendant plaintiff mile	Sep. 30, 2021 EUR (€) lawsuit
Zwijndrecht Site
Loss contingencies
Investment plan for environmental remediation | €																							€ 125
Investment plan for environmental remediation, period (in years)		3 years
Subsequent Event | City of Decatur, Decatur Utilities, and Morgan County
Loss contingencies
Investment plan for environmental remediation | $	$ 99,000,000
Environmental Matters - Remediation
Loss contingencies
Accrued loss contingency reserve | $		$ 28,000,000																				$ 28,000,000
Number of years remediation payments expected to be paid for applicable sites																						20 years
Environmental Matters - Other
Loss contingencies
Accrued loss contingency reserve | $		0																				$ 0
Insurance receivables | $		$ 8,000,000																				$ 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
Environmental Matters - Regulatory Activities | California | Subsequent Event
Loss contingencies
Number of bills signed into law that prohibit use of PFAS in children's products and food packaging | bill	2
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
Number of local water works for whom the water authority supplies water | localWaterWork																				5
Litigation settlement awarded | $															$ 35,000,000
Environmental Matters - Litigation | Decatur, Alabama
Loss contingencies
Number of putative class action and other lawsuits																						2
Number of closed municipal landfills | closedMunicipalLandfill												3
Environmental Matters - Litigation | Minnesota
Loss contingencies
Litigation settlement awarded | $																					$ 897,000,000
Settlement amount paid | $																		$ 850,000,000
Number of recommended options for utilizing the Water Quality and Sustainability Fund seeking public comment | recommendedOption																						3
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									2
Number of additional new claims filed							2
Number of additional defendants | party														6
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 | party														7
Environmental Matters - Litigation | Vermont
Loss contingencies
Number of lawsuits filed													2
Number of additional defendants | party													10
Environmental Matters - Aqueous Film Forming Foam Litigation
Loss contingencies
Number of putative class action and other lawsuits																						1,762
Number of class action lawsuits																						27
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 | U.S. Judicial Panel on Multidistrict Litigation (MDL) | Subsequent Event
Loss contingencies
Number of water supplier cases selected	3
Environmental Matters - Aqueous Film Forming Foam Litigation | Various state courts
Loss contingencies
Number of lawsuits filed													8
Number of lawsuits pending		5																				5	5
Number of cases stayed																						5
Number of lawsuits served																						6
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																				2	2
Environmental Matters - Other PFAS-related Environmental Litigation
Loss contingencies
Increase (decrease) accrued loss contingency reserve | $																						$ 132,000,000
Litigation payments | $																						$ 53,000,000
Environmental Matters - Other PFAS-related Environmental Litigation | U.S. District Court of New York State
Loss contingencies
Number of putative class action and other lawsuits																						1
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
Environmental Matters - Other PFAS-related Environmental Litigation | U.S. District Court of Eastern District of New York
Loss contingencies
Number of lawsuits pending		12																				12	12
Environmental Matters - Other PFAS-related Environmental Litigation | State court of California
Loss contingencies
Number of local water providers | waterProvider					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." | perfluorinatedMaterial																						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																						7
Environmental Matters - Other PFAS-related Environmental Litigation | Michigan
Loss contingencies
Number of putative class action and other lawsuits																						1
Number of plaintiffs | plaintiff																						1
Settlement amount paid | $									$ 55,000,000		$ 70,000,000
Number of lawsuits filed																						280
Total number of federal bellwether cases																						5
Number of federal bellwether cases the court issued the first round of dispositive motion rulings																						2
Number of claims with summary judgment																						1
Number of federal bellwether cases with trial-ready dates set																						3
Additional number of federal bellwether cases																						8
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 | $		$ 494,000,000																				$ 494,000,000
Environmental Matters - Other Environmental Litigation | New Jersey
Loss contingencies
Approximate number of miles of a river seeking to be cleaned | mile																						8
The value the award the plaintiff seeks | $																	$ 165,000,000
Number of chemicals of concern in the sediment | chemical																						8
Number of commercial drum conditioning facilities | facility																						2
Environmental Matters - Other Environmental Litigation | New Jersey | Minimum
Loss contingencies
Number of unnamed defendant | defendant																						120