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Fair Value of Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping
The following table presents assets and liabilities included in the Company's consolidated balance sheets as of December 31, 2020 and 2019 that are recognized at fair value on a recurring basis, and indicate the fair value hierarchy utilized to determine such fair value:
 December 31, 2020December 31, 2019
 Fair value
hierarchy		Carrying
Amount		Fair
Value		Carrying
Amount		Fair
Value
Derivative asset (liability) instruments:
Swap agreements(a)
Level 2$1 $1 $(1)$(1)
Commodity contractsLevel 2$3 $3 $— $— 
(a) Cash collateral amounts were $7 million and $3 million at December 31, 2020 and 2019, which are included in “Prepayments and other current assets” in the consolidated balance sheets.
Estimated fair value of the Company's outstanding debt is as follows:
 December 31, 2020December 31, 2019
 Fair value
hierarchy		Carrying
Amount		Fair
Value		Carrying
Amount		Fair
Value
Long-term debt (including current maturities):
Term loans and senior notesLevel 2$5,153 $5,138 $5,179 $5,113