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Equity (Assumptions and Options) (Details) - Share-based Payment Arrangement, Option [Member] - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Assumptions used to estimate the fair value of options using the Black-Scholes option pricing model [Abstract]      
Expected term (years) 6 years 7 months 6 days 6 years 6 months 7 years
Option activity [Roll Forward]      
Shares underlying options - Balance at beginning of year (in shares) 10,699,410    
Shares underlying options - Granted (in shares) 909,200    
Shares underlying options - Exercised (in shares) (549,452)    
Shares underlying options - forfeited (in shares) 74,347    
Shares underlying options - expired (in shares) (1,679)    
Shares underlying options - Balance at end of year (in shares) 10,983,132 10,699,410  
Shares underlying options - Exercisable (in shares) 8,894,724    
Additional disclosures pertaining to options [Abstract]      
Balance at beginning of year, weighted average exercise price (in dollars per share) $ 49.67    
Granted, weighted average exercise price (in dollars per share) 75.20    
Exercised, weighted average exercise price (in dollars per share) 26.11    
Forfeited, weighted average exercise price (in dollars per share) 76.67    
Expired, weighted average exercise price (in dollars per share) 80.68    
Balance at end of year, weighted average exercise price (in dollars per share) 52.78 $ 49.67  
Exercisable at end of year, weighted average exercise price (in dollars per share) $ 47.16    
Balance at end of year, weighted average remaining contractual term (years) 5 years 2 months 12 days    
Exercisable at end of year, weighted average remaining contractual term (years) 4 years 6 months    
Balance at end of year, aggregate intrinsic value $ 156    
Exercisable at end of year, aggregate intrinsic value $ 156    
Granted, weighted average grant date fair value (in dollars per share) $ 14.46 $ 10.49 $ 9.82
Total intrinsic value of stock options exercised $ 22,000,000 $ 37,000,000 $ 49,000,000
Cash received from option exercises 14,000,000 14,000,000 15,000,000
Tax benefit realized from options exercised $ 5,000,000 $ 9,000,000 $ 11,000,000
Minimum [Member]      
Assumptions used to estimate the fair value of options using the Black-Scholes option pricing model [Abstract]      
Expected volatility (in hundredths) 19.72% 17.91% 17.32%
Expected dividends (in hundredths) 2.45% 2.32% 2.30%
Risk-free rate (in hundredths) 3.50% 1.91% 0.80%
Maximum [Member]      
Assumptions used to estimate the fair value of options using the Black-Scholes option pricing model [Abstract]      
Expected volatility (in hundredths) 20.57% 19.37% 17.75%
Expected dividends (in hundredths) 2.86% 2.50% 2.44%
Risk-free rate (in hundredths) 4.50% 3.85% 1.27%