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Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Options Roll Forward
A summary of award activity by type for the three months ended March 31, 2022 is presented below.
Stock OptionsAwards
(in millions)
Weighted-
Average
Exercise
Price
Aggregate
Intrinsic
Value
 (in millions)
Weighted
Average
Remaining
Contractual
Life (years)
Outstanding at January 1, 20221.4 $26.30 
Granted— $— 
Exercised— $— 
Forfeited / Expired— $— 
Outstanding at March 31, 20221.4 $26.30 
Vested and expected to vest at March 31, 20221.4 $26.30 $2.5 4.36
Exercisable at March 31, 20221.4 $26.30 $2.5 4.30
Schedule of Restricted Stock Units and Restricted Stock Awards Roll Forward
Restricted Stock UnitsUnits
(millions)
Weighted-Average
Fair Value
Outstanding at January 1, 20221.1 $28.85 
Granted0.6 $28.87 
Vested(0.4)$28.43 
Forfeited (1)
— $28.78 
Outstanding at March 31, 20221.3 $29.00 
(1)    Activity during the three months ended March 31, 2022 rounds to zero.
Schedule of Performance Stock Roll Forward
Performance Share UnitsUnits
(millions)
Weighted-Average
Fair Value
Outstanding at January 1, 20220.8 $30.10 
Granted0.4 $30.61 
Vested(0.1)$29.12 
Forfeited(0.2)$29.61 
Outstanding at March 31, 20220.9 $30.46