Earnings per Share (Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income per Common Share) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Basic method (in shares)	153,596,109	160,365,705	153,479,654	167,310,202
Dilutive stock options and restricted stock units (in shares)	0	614,333	0	795,025
Diluted method (in shares)	153,596,109	160,980,038	153,479,654	168,105,227