Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Average Common Shares Outstanding Basic and Diluted

	Three Months Ended March 31
(Millions of shares)	2014	2013
Basic	379.0	387.3
Dilutive effect of stock options	1.3	1.7
Dilutive effect of restricted share and restricted share unit awards	1.8	1.5
Diluted	382.1	390.5