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Pension Plans and Other Post Employment Benefit Plans Basis of Fair Value Measurement (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
Pension Trust Receivables $ 161 [1] $ 655 [2]  
Pension Trust Payables (405) [3] (1,031) [4]  
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12,584 17,827 $ 17,835
Investments Measured at Net Asset Value 3,085 3,086  
Fair Value of Plan Assets, Excluding Trust Receivables and payables and assets measured at NAV 9,743 15,117  
Pension Plan | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,349 6,460  
Pension Plan | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6,190 8,547  
Pension Plan | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 204 110 115
Pension Plan | Cash and Cash Equivalents [Domain]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,348 2,543  
Pension Plan | Cash and Cash Equivalents [Domain] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,348 2,543  
Pension Plan | Cash and Cash Equivalents [Domain] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Cash and Cash Equivalents [Domain] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | US Treasury and Government [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,669 3,271  
Investments Measured at Net Asset Value 35 37  
Pension Plan | US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,669 3,271  
Pension Plan | US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Corporate Debt Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,822 4,591  
Investments Measured at Net Asset Value 3 7  
Pension Plan | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,822 4,589  
Pension Plan | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 2 3
Pension Plan | Asset-backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 695 682  
Pension Plan | Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 695 682  
Pension Plan | Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Hedge Funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3    
Investments Measured at Net Asset Value 347 394  
Pension Plan | Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Pension Plan | Hedge Funds [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Pension Plan | Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 0 0
Pension Plan | Private Market Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 3  
Investments Measured at Net Asset Value 1,991 1,822  
Pension Plan | Private Market Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Private Market Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Private Market Securities [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 3 3
Pension Plan | Real Estate [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 132 26  
Investments Measured at Net Asset Value 669 759  
Pension Plan | Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 132 26 28
Pension Plan | Derivative, Asset [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2    
Pension Plan | Derivative, Asset [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Pension Plan | Derivative, Asset [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2    
Pension Plan | Derivative, Asset [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Pension Plan | Other Investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 62 78  
Pension Plan | Other Investments [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Pension Plan | Other Investments [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 3  
Pension Plan | Other Investments [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 62 75 73
Non-US [Member] | Pension Plan | Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 806 1,523  
Investments Measured at Net Asset Value 20 34  
Non-US [Member] | Pension Plan | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 806 1,523  
Non-US [Member] | Pension Plan | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Non-US [Member] | Pension Plan | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0 3
UNITED STATES | Pension Plan | Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,200 [5] 2,400 [6]  
Investments Measured at Net Asset Value 20 33  
UNITED STATES | Pension Plan | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,195 [5] 2,394 [6]  
UNITED STATES | Pension Plan | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 [5] 2 [6]  
UNITED STATES | Pension Plan | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3 [5] 4 [6] $ 5
Common Stock [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Amount of Employer and Related Party Securities Included in Plan Assets, Percent 2.00%    
Common Stock [Member] | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Amount of Employer and Related Party Securities Included in Plan Assets $ 250 $ 201  
Amount of Employer and Related Party Securities Included in Plan Assets, Percent   1.00%  
[1] Primarily receivables for investments securities sold.
[2] Primarily receivables for investments securities sold.
[3] Primarily payables for investment securities purchased.
[4] Primarily payables for investment securities purchased.
[5] The Corteva pension plans directly held $250 million (approximately 2 percent of total plan assets) of Corteva, Inc. common stock at December 31, 2022.
[6] The Corteva pension plans directly held $201 million (approximately 1 percent of total plan assets) of Corteva, Inc. common stock at December 31, 2021.