Stock-Based Compensation (Details 3) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 4.41
Exercise Price, high end of range	$ 47.84
Outstanding Options (in shares)	7.0
Weighted Average Exercise Price	$ 16.00
Weighted Average Exercise Price	$ 16.95
Range of Exercise Price $4.41 - $7.49
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 4.41
Exercise Price, high end of range	$ 7.49
Outstanding Options (in shares)	1.5
Weighted Average Remaining Contractual Life (in years)	4 years 9 months
Weighted Average Exercise Price	$ 4.41
Exercisable Options (in shares)	1.1
Weighted Average Exercise Price	$ 4.41
Range of Exercise Price $7.50 - $9.59
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 7.50
Exercise Price, high end of range	$ 9.59
Outstanding Options (in shares)	0.1
Weighted Average Remaining Contractual Life (in years)	0 years 1 month
Weighted Average Exercise Price	$ 7.52
Exercisable Options (in shares)	0.1
Weighted Average Exercise Price	$ 7.52
Range of Exercise Price $9.60 - $10.20
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 9.60
Exercise Price, high end of range	$ 10.20
Outstanding Options (in shares)	0.4
Weighted Average Remaining Contractual Life (in years)	1 year 4 months
Weighted Average Exercise Price	$ 10.14
Exercisable Options (in shares)	0.4
Weighted Average Exercise Price	$ 10.14
Range of Exercise Price $10.21 - $16.28
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 10.21
Exercise Price, high end of range	$ 16.28
Outstanding Options (in shares)	2.0
Weighted Average Remaining Contractual Life (in years)	5 years 11 months
Weighted Average Exercise Price	$ 12.79
Exercisable Options (in shares)	1.0
Weighted Average Exercise Price	$ 12.06
Range of Exercise Price $16.29 - $26.09
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 16.29
Exercise Price, high end of range	$ 26.09
Outstanding Options (in shares)	1.6
Weighted Average Remaining Contractual Life (in years)	6 years 3 months
Weighted Average Exercise Price	$ 19.18
Exercisable Options (in shares)	0.8
Weighted Average Exercise Price	$ 19.38
Range of Exercise Price $26.10 - $28.14
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 26.10
Exercise Price, high end of range	$ 28.14
Outstanding Options (in shares)	0.5
Weighted Average Remaining Contractual Life (in years)	2 years 3 months
Weighted Average Exercise Price	$ 26.11
Exercisable Options (in shares)	0.5
Weighted Average Exercise Price	$ 26.11
Range of Exercise Price $28.15 - $36.03
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 28.15
Exercise Price, high end of range	$ 36.03
Outstanding Options (in shares)	0.5
Weighted Average Remaining Contractual Life (in years)	2 years 11 months
Weighted Average Exercise Price	$ 29.50
Exercisable Options (in shares)	0.5
Weighted Average Exercise Price	$ 29.50
Range of Exercise Price $36.04 - $47.84
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 36.04
Exercise Price, high end of range	$ 47.84
Outstanding Options (in shares)	0.4
Weighted Average Remaining Contractual Life (in years)	3 years 11 months
Weighted Average Exercise Price	$ 38.91
Exercisable Options (in shares)	0.4
Weighted Average Exercise Price	$ 38.91
Stock Options
Options outstanding and exercisable by range of exercise prices
Weighted Average Remaining Contractual Life (in years)	4 years 11 months
Exercisable Options (in shares)	4.8