Capital Stock (Tables)

12 Months Ended

Dec. 31, 2012

Weighted Average Number of Shares Outstanding Reconciliation [Abstract]

Schedule Of Weighted Average Number Of Shares [Table Text Block]

	Years Ended December 31,
(In millions)	2012	2011	2010
Weighted-average shares
Basic (a)	48.4	47.8	48.2
Effect of dilutive stock awards	0.2	0.3	0.2
Diluted (a)	48.6	48.1	48.4
Antidilutive stock awards excluded from denominator	2.4	2.3	2.2