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Equity and Equity Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Schedule of restricted stock activity Restricted stock activity under the plan for the years ended December 31, 2021, 2020 and 2019 is as follows:
Restricted Stock Award Activity
202120202019
Restricted Stock AwardsWeighted-Average Grant PriceRestricted Stock AwardsWeighted-Average Grant PriceRestricted Stock AwardsWeighted-Average Grant Price
(in millions, except wtd avg grant price)
Outstanding at January 12.2 $54.06 2.6 $51.28 2.4 $49.24 
Granted2.3 39.93 1.4 56.84 1.8 51.75 
Vested(1.4)51.15 (1.6)51.95 (1.5)48.65 
Forfeited(0.2)44.01 (0.2)56.11 (0.1)50.78 
Outstanding at December 312.9 $45.66 2.2 $54.06 2.6 $51.28 
Schedule of stock option activity Stock option activity under the plan for the years ended December 31, 2021, 2020 and 2019 is as follows:
Stock Option Activity
202120202019
Stock OptionsWeighted-Average Exercise PriceStock OptionsWeighted-Average Exercise PriceStock OptionsWeighted-Average Exercise Price
(in millions, except wtd avg grant price)
Outstanding at January 15.4$52.37 3.9$49.57 2.5 $48.99 
Granted1.0 39.78 1.6 58.89 1.4 50.52 
Exercised — — (0.1)44.05 — — 
Forfeited(0.2)49.61 — — — — 
Outstanding at December 316.2 $50.41 5.4 $52.37 3.9 $49.57