Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Average Common Shares Outstanding Basic and Diluted

	Three Months Ended June 30		Six Months Ended June 30
(Millions of shares)	2014	2013	2014	2013
Basic	375.8	384.7	377.4	386.0
Dilutive effect of stock options	1.2	1.6	1.3	1.7
Dilutive effect of restricted share and restricted share unit awards	1.4	1.5	1.6	1.5
Diluted	378.4	387.8	380.3	389.2