Stock-Based Compensation Plans (Summary Of Stock Option Activity) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Outstanding, beginning balance weighted average remaining contractual term	7 years 10 months 24 days	6 years 7 months 17 days
Outstanding, beginning balance, weighted average fair value at date of grant	$ 3.74	$ 4.73
Exercisable, beginning balance, weighted average remaining contractual term	7 years 3 months 18 days	9 months 18 days
Exercised, shares	(0.3)
Exercised, weighted average exercise price	$ 12.22
Forfeited/cancelled, shares	(0.1)
Forfeited/cancelled, weighted average exercise price	$ 13.31
Outstanding, ending balance, shares	0.8	1.2
Outstanding, ending balance, weighted average exercise price	$ 13.12	$ 12.91
Outstanding, ending balance weighted average remaining contractual term	7 years 10 months 24 days	6 years 7 months 17 days
Outstanding, ending balance, weighted average fair value at date of grant	$ 3.74	$ 4.73
Exercisable, ending balance, shares	0.2	0.3
Exercisable, ending balance, weighted average exercise price	$ 13.16	$ 11.86
Exercisable, ending balance, weighted average remaining contractual term	7 years 3 months 18 days	9 months 18 days
Exercisable, ending balance, weighted average fair value at grant date	$ 4.02	$ 3.99