Stock-Based Compensation (Details 3) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014
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)	5.6
Weighted Average Exercise Price	$ 18.23
Weighted Average Exercise Price	$ 17.86
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	$ 9.59
Outstanding Options (in shares)	0.7
Weighted Average Remaining Contractual Life (in years)	4 years 0 months
Weighted Average Exercise Price	$ 4.41
Exercisable Options (in shares)	0.7
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	$ 9.60
Exercise Price, high end of range	$ 10.21
Outstanding Options (in shares)	0.2
Weighted Average Remaining Contractual Life (in years)	0 years 4 months
Weighted Average Exercise Price	$ 10.13
Exercisable Options (in shares)	0.2
Weighted Average Exercise Price	$ 10.13
Range of Exercise Price $9.60 - $10.20
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 10.22
Exercise Price, high end of range	$ 18.13
Outstanding Options (in shares)	1.7
Weighted Average Remaining Contractual Life (in years)	5 years 5 months
Weighted Average Exercise Price	$ 12.90
Exercisable Options (in shares)	1.2
Weighted Average Exercise Price	$ 12.44
Range of Exercise Price $10.21 - $16.28
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 18.14
Exercise Price, high end of range	$ 26.09
Outstanding Options (in shares)	1.2
Weighted Average Remaining Contractual Life (in years)	6 years 0 months
Weighted Average Exercise Price	$ 19.17
Exercisable Options (in shares)	0.8
Weighted Average Exercise Price	$ 19.38
Range of Exercise Price $16.29 - $26.09
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 26.10
Exercise Price, high end of range	$ 29.06
Outstanding Options (in shares)	0.5
Weighted Average Remaining Contractual Life (in years)	1 year 3 months
Weighted Average Exercise Price	$ 26.11
Exercisable Options (in shares)	0.5
Weighted Average Exercise Price	$ 26.11
Range of Exercise Price $26.10 - $28.14
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 29.07
Exercise Price, high end of range	$ 30.46
Outstanding Options (in shares)	0.8
Weighted Average Remaining Contractual Life (in years)	5 years 2 months
Weighted Average Exercise Price	$ 29.32
Exercisable Options (in shares)	0.4
Weighted Average Exercise Price	$ 29.52
Range of Exercise Price $28.15 - $36.03
Options outstanding and exercisable by range of exercise prices
Exercise Price, low end of range	$ 30.47
Exercise Price, high end of range	$ 36.03
Outstanding Options (in shares)	0.1
Weighted Average Remaining Contractual Life (in years)	9 years 2 months
Weighted Average Exercise Price	$ 30.47
Exercisable Options (in shares)	0
Weighted Average Exercise Price	$ 0.00
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)	2 years 11 months
Weighted Average Exercise Price	$ 38.88
Exercisable Options (in shares)	0.4
Weighted Average Exercise Price	$ 38.88
Stock Options
Options outstanding and exercisable by range of exercise prices
Weighted Average Remaining Contractual Life (in years)	4 years 7 months
Exercisable Options (in shares)	4.2

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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