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, 2019	Sep. 30, 2018		Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Basic method (in shares)	160,365,705	173,047,246	[1]	167,310,202	172,949,450	[1]
Dilutive stock options and restricted stock units (in shares)	614,333	1,128,021		795,025	1,252,310
Diluted method (in shares)	160,980,038	174,175,267	[1]	168,105,227	174,201,760	[1]

[1] Reclassified to conform to current presentation (see Note A).