Stock-Based Compensation, Stock Option Valuation Assumptions (Details) - Stock Options [Member] - $ / shares		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Assumptions [Abstract]
Weighted-average grant date fair value of grants (in dollars per share)		$ 19.72	$ 24.72	$ 18.84
Risk-free interest rate	[1]	2.50%	2.60%	2.10%
Dividend yield	[2]	2.70%	2.60%	2.50%
Expected volatility	[3]	42.40%	45.60%	48.20%
Expected life in months	[4]	60 months	66 months	68 months

[1] The risk-free interest rate is based upon the rate on a zero-coupon U.S. Treasury bill, for periods within the contractual life of the option, in effect at the time of the grant.

[2] The dividend yield is based on the average of historical stock prices and actual dividends paid.

[3] Expected volatility is based on the historical volatility of the Company’s stock price, over a period similar to the expected life of the option.

[4] The expected term of the option is based on the historical employee exercise behavior, the vesting terms of the respective option, and a contractual life of either seven or ten years.