Stock-Based Compensation (Details 10) (Stock Appreciation Rights [Member], USD $) In Millions, except Per Share data, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 $28.24 to $36.935 [Member]	Dec. 31, 2013 $46.78 to $51.395 [Member]	Dec. 31, 2013 $81.105 to $81.14 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices per Share, lower range limit			$ 28.24	$ 46.78	$ 81.105
Range of Exercise Prices per Share, upper range limit			$ 36.935	$ 51.395	$ 81.14
Outstanding awards, shares	1.8	2.2	0.9	0.6	0.3
Outstanding awards, weighted-average remaining contractual term			3 years 5 months 5 days	5 years 3 months 7 days	7 years
Outstanding awards, aggregate intrinsic value			$ 49.5	$ 21.6	$ 1.0
Exercisable, shares	1.1		0.8	0.3	0
Exercisable, weighted-average remaining contractual term			3 years 1 month 6 days	4 years 8 months 12 days	0 years
Exercisable, aggregate intrinsic value			$ 40.5	$ 12.6	$ 0