Equity (Assumptions and Options) (Details) - Share-based Payment Arrangement, Option [Member] - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assumptions used to estimate the fair value of options using the Black-Scholes option pricing model [Abstract]
Expected term (years)	6 years 6 months	7 years	7 years
Option activity [Roll Forward]
Shares underlying options - Balance at beginning of year (in shares)	10,013,312
Shares underlying options - Granted (in shares)	1,304,270
Shares underlying options - Exercised (in shares)	(594,220)
Shares underlying options - forfeited (in shares)	23,952
Shares underlying options - Balance at end of year (in shares)	10,699,410	10,013,312
Shares underlying options - Exercisable (in shares)	8,152,185
Additional disclosures pertaining to options [Abstract]
Balance at beginning of year, weighted average exercise price (in dollars per share)	$ 44.87
Granted, weighted average exercise price (in dollars per share)	75.28
Exercised, weighted average exercise price (in dollars per share)	23.77
Forfeited, weighted average exercise price (in dollars per share)	78.33
Balance at end of year, weighted average exercise price (in dollars per share)	49.67	$ 44.87
Exercisable at end of year, weighted average exercise price (in dollars per share)	$ 41.28
Balance at end of year, weighted average remaining contractual term (years)	5 years 8 months 12 days
Exercisable at end of year, weighted average remaining contractual term (years)	4 years 9 months 18 days
Balance at end of year, aggregate intrinsic value	$ 363
Exercisable at end of year, aggregate intrinsic value	$ 345
Granted, weighted average grant date fair value (in dollars per share)	$ 10.49	$ 9.82	$ 7.08
Total intrinsic value of stock options exercised	$ 37,000,000	$ 49,000,000	$ 71,000,000
Cash received from option exercises	14,000,000	15,000,000	30,000,000
Tax benefit realized from options exercised	$ 9,000,000	$ 11,000,000	$ 17,000,000
Minimum [Member]
Assumptions used to estimate the fair value of options using the Black-Scholes option pricing model [Abstract]
Expected volatility (in hundredths)	17.91%	17.32%	14.63%
Expected dividends (in hundredths)	2.32%	2.30%	2.50%
Risk-free rate (in hundredths)	1.91%	0.80%	0.49%
Maximum [Member]
Assumptions used to estimate the fair value of options using the Black-Scholes option pricing model [Abstract]
Expected volatility (in hundredths)	19.37%	17.75%	16.31%
Expected dividends (in hundredths)	2.50%	2.44%	2.72%
Risk-free rate (in hundredths)	3.85%	1.27%	1.52%