Share-Based Payments (Details 1) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Summary of share based compensation expense associated with different programs
Subtotal	$ 48.1	$ 54.3
Capitalized share-based compensation costs	(2.7)	(3.1)
Share-based compensation expense included in total costs and expenses	45.4	51.2
Market stock units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	9.6	13.4
Time-vested restricted stock units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	26.9	30.1
Cash settled performance shares
Summary of share based compensation expense associated with different programs
Share-based compensation expense	3.5	0.2
Performance units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	4.5	6.9
Employee stock purchase plan
Summary of share based compensation expense associated with different programs
Share-based compensation expense	$ 3.6	$ 3.7

Share based compensation expense included in costs and expenses.

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Summary of share-based compensation expense associated with different programs.

+ References

No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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