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Fair Value Measurements
3 Months Ended
Mar. 31, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
 
The carrying amounts of cash and cash equivalents, net accounts receivable, accounts payable and accrued expenses and other current liabilities approximate fair value based on their short-term maturities. The carrying values of our debt and notes receivable approximate fair value since these instruments bear interest either at variable rates or fixed rates, which are not significantly different from market rates. Based on the fair value hierarchy, our total debt of $523.5 million and $524.7 million as of March 31, 2021 and December 31, 2020, respectively, and our notes receivable of $44.3 million and $45.7 million as of March 31, 2021 and December 31, 2020, respectively, were categorized as Level 2.
Recurring Fair Value Measurements

The following tables present information about our gross assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2021 and December 31, 2020 (in millions):
Fair Value Measurements as of March 31, 2021
Level 1 InputsLevel 2 InputsLevel 3 InputsTotal
Assets:
Commodities contracts$290.1 $115.8 $5.0 $410.9 
Foreign currency contracts— 9.5 — 9.5 
Interest rate contract— 2.8 — 2.8 
Cash surrender value of life insurance— 12.5 — 12.5 
Total assets at fair value$290.1 $140.6 $5.0 $435.7 
Liabilities:    
Commodities contracts$277.3 $109.6 $5.0 $391.9 
Interest rate contract— 1.3 — 1.3 
Foreign currency contracts— 7.4 — 7.4 
Total liabilities at fair value$277.3 $118.3 $5.0 $400.6 
Fair Value Measurements as of December 31, 2020
Level 1 InputsLevel 2 InputsLevel 3 InputsTotal
Assets:
Commodities contracts$233.5 $127.9 $9.5 $371.0 
Foreign currency contracts— 7.5 — 7.5 
Cash surrender value of life insurance— 11.4 — 11.4 
Total assets at fair value$233.5 $146.8 $9.5 $389.9 
Liabilities:
Commodities contracts$223.0 $96.8 $6.3 $326.0 
Interest rate contract— 3.7 — 3.7 
Foreign currency contracts— 19.8 — 19.8 
Total liabilities at fair value$223.0 $120.2 $6.3 $349.5 

For our derivative contracts, we may enter into master netting, collateral and offset agreements with counterparties. These agreements provide us the ability to offset a counterparty’s rights and obligations, request additional collateral when necessary, or liquidate the collateral in the event of counterparty default. We net the fair value of cash collateral paid or received against fair value amounts recognized for net derivative positions executed with the same counterparty under the same master netting or offset agreement.
We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements when a legal right of offset exists. The following tables summarize those derivative balances subject to the right of offset as presented on our Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020 (in millions):

Fair Value as of March 31, 2021
Gross Amounts
Gross AmountsGross AmountsNet AmountsCash without
RecognizedOffsetPresentedCollateralRight of OffsetNet Amounts
Assets:
Commodities contracts$410.9 $339.9 $71.0 $— $— $71.0 
Interest rate contract2.8 — 2.8 — — 2.8 
Foreign currency contracts9.5 3.5 6.0 — — 6.0 
Total assets at fair value$423.2 $343.4 $79.8 $— $— $79.8 
Liabilities:
Commodities contracts$391.9 $339.9 $52.0 $2.0 $— $50.0 
Interest rate contract1.3 — 1.3 — — 1.3 
Foreign currency contracts7.4 3.5 3.9 — — 3.9 
Total liabilities at fair value$400.6 $343.4 $57.2 $2.0 $— $55.1 
Fair Value as of December 31, 2020
Gross Amounts
Gross AmountsGross AmountsNet AmountsCash without
RecognizedOffsetPresentedCollateralRight of OffsetNet Amounts
Assets:
Commodities contracts$371.0 $287.1 $83.9 $1.2 $— $82.7 
Foreign currency contracts7.5 7.5 — — — — 
Total assets at fair value$378.5 $294.6 $83.9 $1.2 $— $82.7 
Liabilities:
Commodities contracts$326.0 $287.1 $38.9 $2.3 $— $36.6 
Interest rate contract3.7 — 3.7 — — 3.7 
Foreign currency contracts19.8 7.5 12.3 — — 12.3 
Total liabilities at fair value$349.5 $294.6 $54.9 $2.3 $— $52.6 

At March 31, 2021 and December 31, 2020, we did not present any amounts gross on our Condensed Consolidated Balance Sheets where we had the right of offset.
    Concentration of Credit Risk

Our individual over-the-counter ("OTC") counterparty exposure is managed within predetermined credit limits. It includes the use of cash-call margins when appropriate, thereby reducing the risk of significant nonperformance. At March 31, 2021, one of our counterparties with an exposure amount of $6.9 million represented over 10% of our credit exposure to OTC derivative counterparties.