Share-Based Payments (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Summary of share based compensation expense associated with different programs
Subtotal	$ 76.6	$ 59.5
Capitalized share-based compensation costs	(2.6)	(2.3)
Share-based compensation expense included in total costs and expenses	74.0	57.2
Stock Options
Summary of share based compensation expense associated with different programs
Share-based compensation expense	0	0.3
Market stock units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	14.9	8.5
Time-vested restricted stock units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	29.2	27.1
Cash settled performance shares
Summary of share based compensation expense associated with different programs
Share-based compensation expense	21.4	20.4
Performance units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	6.3	0
Employee stock purchase plan
Summary of share based compensation expense associated with different programs
Share-based compensation expense	$ 4.8	$ 3.2