Stock-Based Compensation Plans (Performance-Based Restricted Stock-Units) (Details) (Performance Shares [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Performance Shares [Member]
Non-vested, beginning balance, shares	0.3
Non-vested, beginning balance, weighted average fair value at date of grant	$ 12.90
Granted, shares	0
Granted, weighted average fair value at date of grant	$ 0.00
Vested, shares	(0.3)
Vested, weighted average fair value at date of grant	$ 12.90
Forfeited, shares	0
Forfeited, weighted average fair value at date of grant	$ 0.00
Non-vested, ending balance, shares	0
Non-vested, ending balance, weighted average fair value at date of grant	$ 0.00