Equity (Weighted Average Assumptions Used to Determine Fair Value of Stock Options) (Details) - Stock Options - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity - Stock-based Compensation Plans [Line Items]
Dividend yield	3.76%	3.52%	3.05%
Risk-free rate of return, Minimum	2.52%	2.02%	0.94%
Risk-free rate of return, Maximum	3.32%	3.40%	3.22%
Expected volatility	30.27%	34.18%	34.19%
Exercise multiple	1.43	1.43	1.43
Post-vesting termination rate	3.86%	3.77%	2.94%
Contractual term (years)	10 years	10 years	10 years
Expected life (years)	6 years	6 years	6 years
Weighted average exercise price of stock options granted	$ 44.65	$ 45.50	$ 46.85
Weighted average fair value of stock options granted	$ 10.36	$ 11.87	$ 12.36