Share-Based Compensation - Stock Options Narrative (Details) (Stock Option and Incentive Plan [Member], USD $)
In Millions, except Per Share data, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Fair value | $ 1.0 | $ 2.5 | $ 16.8 |
Weighted average fair value of options granted (in dollars per share) | $ 61.82 | $ 40.43 | $ 30.27 |
Exercises in period total intrinsic value | 77.4 | 86.8 | 35.4 |
Intrinsic value of exercisable options | $ 341.9 | ||
Options available for future grant under the Company's option plans (in shares) | 3.4 | ||
Minimum [Member]
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vesting period | 3 years | ||
Expiration term | 7 years | ||
Maximum [Member]
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vesting period | 5 years | ||
Expiration term | 10 years |