Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings per Share [Abstract]

Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income per Common Share

	Three Months Ended
	March 31,
(Weighted-average shares)	2015	2014
Basic method	177,734,159	181,367,565
Dilutive stock options and restricted stock units	507,457	1,209,005
Diluted method	178,241,616	182,576,570

Anti Dilutive Securities Not Included in Computation of Diluted EPS

	Three Months Ended
		March 31,
		2015	2014
Antidilutive stock options excluded from diluted shares		3,314,751		1,555,015
Weighted average price of these options	$	57.19	$	58.97