Equity (Performance Share and Restricted Stock Unit) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Performance Shares [Member]
Summary of performance share activity
Shares Outstanding at January 1,	4,822,028
Granted Shares	1,749,212
Forfeited Shares	(151,075)
Paid	(1,346,025)
Shares Outstanding at December 31,	5,074,140
Expected to vest at December 31,	5,067,337
Summary of Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value Outstanding January 1,	$ 36.93
Granted Weighted Average Grant Date Fair Value	$ 50.86
Forfeited Weighted Average Grant Date Fair Value	$ 40.87
Payable Weighted Average Grant Date Fair Value	$ 32.24
Weighted Average Grant Date Fair Value Outstanding December 31,	$ 42.86
Weighted Average Grant Date Fair Value Share expected to vest at December 31,	$ 38.60
Restricted Stock Units [Member]
Summary of performance share activity
Shares Outstanding at January 1,	2,080,148
Granted Shares	2,182,213
Forfeited Shares	(395,365)
Paid	(538,480)
Shares Outstanding at December 31,	3,328,516
Expected to vest at December 31,	2,995,664
Summary of Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value Outstanding January 1,	$ 36.55
Granted Weighted Average Grant Date Fair Value	$ 32.34
Forfeited Weighted Average Grant Date Fair Value	$ 33.97
Payable Weighted Average Grant Date Fair Value	$ 33.17
Weighted Average Grant Date Fair Value Outstanding December 31,	$ 33.35
Weighted Average Grant Date Fair Value Share expected to vest at December 31,	$ 33.34