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Share-based Compensation and Other Employee Benefits (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule share-based compensation expense and related tax benefit
The following table summarizes the total share-based compensation expense and related tax benefit:
Years Ended
(In millions)December 31, 2021December 31, 2020December 31, 2019
Share-based compensation expense$46 $40 $46 
Tax benefit$2 $8 $6 
Summarizes of Stock Option Activity
The following table summarizes our stock option activity under the Plan for the year ended December 31, 2021:
(In millions, except per share data)Number
of Shares		Weighted-
average
Exercise Price
Per Share		Weighted-
average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic
Value
Outstanding at beginning of year2 $15.58 
Granted— — 
Exercised(1)8.00 
Forfeited— — 
Outstanding at end of year1 $15.74 5.7$11 
Exercisable at end of year1 $14.12 5.5$11 
Schedule of Weighted-average Grant-date Fair Value and related Valuation Assumptions
The following table provides the weighted-average grant-date fair value and related valuation assumptions for these awards granted during the year ended December 31, 2019:

Weighted-average grant-date fair value$12.19
Valuation assumption ranges:
Expected term (years)6.0
Risk-free interest rate1.8 %-2.5%
Expected volatility29.6 %-30.0%
Schedule of Summary of RSA/RSU Activity The following table summarizes our RSA/RSU activity under the Plan for the year ended December 31, 2021:
(In millions, except per share data)Number of SharesWeighted-average
Grant-date
Fair Value
Per Share		Weighted-average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic
Value
Nonvested at beginning of year4 $14.07 
Granted2 27.60 
Vested(2)14.88 
Forfeited— — 
Nonvested at end of year4 $22.47 0.98$71