Share-Based Payments (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of share based compensation expense associated with different programs
Share-based compensation expense	$ 146,210,000	$ 123,956,000	$ 117,347,000
Subtotal	255,900,000	184,300,000	150,100,000
Capitalized share-based compensation costs	(9,800,000)	(5,400,000)	(4,500,000)
Share-based compensation expense included in total costs and expenses	246,100,000	178,900,000	145,600,000
Stock options
Summary of share based compensation expense associated with different programs
Share-based compensation expense	600,000	2,300,000	5,900,000
Market stock units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	32,800,000	23,300,000	14,600,000
Time-vested restricted stock units
Summary of share based compensation expense associated with different programs
Share-based compensation expense	103,500,000	93,000,000	89,600,000
Performance-vested restricted stock units settled in shares [Member]
Summary of share based compensation expense associated with different programs
Share-based compensation expense	0	100,000	1,000,000
Cash settled performance shares
Summary of share based compensation expense associated with different programs
Share-based compensation expense	109,800,000	60,400,000	32,700,000
Employee stock purchase plan
Summary of share based compensation expense associated with different programs
Share-based compensation expense	$ 9,200,000	$ 5,200,000	$ 6,300,000