Schedule of Share Based Compensation Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Intrinsic Value of Stock Options Exercised	$ 49.0	$ 58.0	$ 42.2
Stock Compensation Expense Related to Stock Option Awards	$ 14.8	$ 15.2	$ 15.5
Issued Stock Options	1.1	1.1	1.7
Weighted Average Fair Value of Stock Options issued (per share)	$ 13.70	$ 12.82	$ 10.92
Fair Value of Stock Options Issued	$ 15.3	$ 15.0	$ 18.1

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

The fair value of stock issued in noncash financing activities.

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The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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