Shareholders' Equity and Earnings per Common Share - Common Stock Rollforward (Details)	0 Months Ended	9 Months Ended
	Sep. 15, 2014	Sep. 30, 2014	Sep. 30, 2013
Common shares, beginning balance		261,675,811	230,000,000
Common shares issued		0	30,800,000
Common stock acquired - share repurchase	505,305	(16,600,000)	0
Share-based compensation programs		1,300,000	0
Common shares, ending balance		246,430,073	260,800,000
Common Stock, Issued
Common shares, beginning balance		261,800,000	230,100,000
Common shares issued		0	30,800,000
Common stock acquired - share repurchase		0	0
Share-based compensation programs		1,700,000	0
Common shares, ending balance		263,500,000	260,900,000
Common Stock, Held in Treasury
Common shares, beginning balance		(100,000)	(100,000)
Common shares issued		0	0
Common stock acquired - share repurchase		16,600,000	0
Share-based compensation programs		(400,000)	0
Common shares, ending balance		(17,100,000)	(100,000)