Share-Based Compensation Plans - Options Activity (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based compensation plans [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	3,500,000
Share-based Compensation Plans Optoins Outstanding [Roll Forward]
Beginning Balances - shares	2,612,000	2,967,000	3,355,000
Options granted - shares	0	396,000	290,000
Options Exercised - shares	(302,000)	(71,000)	(562,000)
Options Forfeited or Expired - shares	(835,000)	(680,000)	(116,000)
Ending Balance - shares	1,475,000	2,612,000	2,967,000
Share-based Compensation Plans Optoins Outstanding Exercise Price [Abstract]
Beginning Balances - Exercise Price	$ 30.23	$ 30.92	$ 29.10
Options granted - Exercise Price	$ 0	$ 22.55	$ 31.47
Options Exercised - Exercise Price	$ 22.30	$ 19.04	$ 20.66
Options Forfeited or Expired - Exercise Price	$ 34.25	$ 29.92	$ 29.47
Ending Balance - Exercise Price	$ 29.58	$ 30.23	$ 30.92
Outstanding Options - Remaining Term Years		2 years 5 months 12 days
Outstanding Options - Average Intrinsic Value	$ 7.2
Exercisable Options - Shares	1,154,000	2,000,000	2,400,000
Exercisable Options - Exercise Price	$ 30.92	$ 32.15	$ 32.03
Exercisable Options - Remaining Term Years		1 year 7 months 20 days
Exercisable Options - Average Intrinsic Value	4.2
Options Expected to Vest in Future Periods - Shares	314,000
Options Expected to Vest in Future Periods - Exercise Price	$ 24.81
Options Expected to Vest in Future Periods - Remaining Term Years		4 years 11 months 2 days
Options Expected to Vest in Future Periods - Average Intrinsic Value	2.9
Market Price per Share	$ 34.14
Total intrinsic value of options exercised	2.0	0.6	5.6
Intrinsic value of options exercised per share	$ 6.74	$ 8.07	$ 9.99
Total fair value of options vested	$ 1.8	$ 1.8	$ 3.2