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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Summary of stock option activity
The following is a summary of stock option activity in 2020:
Shares (000’s)Weighted Average
Exercise Price		Weighted
Average
Remaining
Contractual
Life (years)		Intrinsic
Value
($000’s)
Outstanding as of December 31, 20194,077 $60.49   
Options granted— —   
Options exercised(111)45.75   
Options forfeited(9)60.50 
Options expired(3)60.50 
Outstanding as of December 31, 20203,954 60.90 4.8$462 
Exercisable as of December 31, 20203,954 60.90 4.8$462 
Summary of status of nonvested restricted stock and restricted stock units and changes during the year
A summary of the status of our non-vested restricted stock and restricted stock units (including time-based and performance-based awards) as of December 31, 2020, and changes during the year ended December 31, 2020, follows:
Restricted
Stock
(000’s)		Weighted
Average
Grant Date
Fair Value		Restricted
Stock Units (000’s)		Weighted
Average
Grant Date
Fair Value
Nonvested at December 31, 2019248 $58.21 539 $56.99 
Granted170 44.36 446 59.81 
Vested(136)56.54 (271)55.14 
Forfeited(49)54.08 — — 
Nonvested at December 31, 2020233 49.94 714 59.46