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Share-Based Compensation
9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-Based Compensation
(11) Share-Based Compensation

A summary of compensation expense during the three and nine months ended September 30, 2021 and 2020 is presented below:
Three Months Ended
September 30,
Nine Months Ended
September 30,
(in millions)2021202020212020
Performance Unit Awards$ $— $(3)$— 
CVR Partners LTIP - Phantom Unit Awards6 — 18 — 
Incentive Unit Awards5 (1)16 — 
Total Share-Based Compensation Expense$11 $(1)$31 $—