Share-Based And Other Deferred Compensation (Equity Grants, Other) (Details) (USD $)	12 Months Ended		12 Months Ended				1 Months Ended	12 Months Ended
	Dec. 31, 2011 Equity Grants [Member]	Dec. 31, 2010 Equity Grants [Member]	Dec. 31, 2011 Other [Member] employees years	Dec. 31, 2010 Other [Member]	Dec. 31, 2009 Other [Member]	Dec. 31, 2011 2011 Equity Grants [Member] Equity Grants [Member] months	Sep. 30, 2010 2010 Equity Grants [Member] employees	Dec. 31, 2010 2010 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2011 2009 Equity Grants [Member]	Dec. 31, 2011 2009 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2010 2009 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2009 2009 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2011 RSUs [Member] 2011 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2010 RSUs [Member] 2010 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2009 RSUs [Member] 2009 Equity Grants [Member] years days	Dec. 31, 2009 RSUs [Member] 2009 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2009 Service-Based Awards [Member] 2009 Equity Grants [Member]	Dec. 31, 2011 Maximum [Member] 2011 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2010 Maximum [Member] 2010 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2009 Maximum [Member] 2009 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2011 Minimum [Member] 2011 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2010 Minimum [Member] 2010 Equity Grants [Member] Equity Grants [Member]	Dec. 31, 2009 Minimum [Member] 2009 Equity Grants [Member] Equity Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period													2,273	1,474		900	2,663
Service based awards, grant date fair value																		$ 36.41	$ 35.79	$ 33.52	$ 21.93	$ 23.31	$ 11.73
Vested units	3,077					1,552		1,457					37
Forfeited event units	121					76		32
Compensation expense related to Service-based Award						$ 47,299,000		$ 35,347,000				$ 28,078,000
Unvested units	8,351	9,437											97	275
Share based awards reclassified from additional paid-in-capital to other current liabilities						2,828,000								2,686,000
Total compensation cost not yet recognized						82,718,000				1,816,000	1,816,000	1,120,000		352,000
Weighted-average period over which the compensation cost is expected to recognize, in months						23
Grant date fair value	188,051,000	186,770,000										538,000		3,226,000
Terms of Service-based Awards amended														97
Number of awards segregated															180
Minimum number of days for vesting															20
Number of years of requirement															5
Share based awards satisfied market conditions										180	0	540
Income tax benefit related to share-based compensation arrangements			19,423,000	9,392,000	5,290,000
Incremental Compensation Expense From Modifications			4,261,000
Special charges relating to cancellation of RSUs			20,129,000
Number of RSUs cancelled			988
Special charges relating to cancellation of RSUs in employee compensation			2,741,000
Number of RSUs cancelled in employee compensation			311
Unvested RSUs granted			2,400,000
Deferred cash awards granted			$ 3,900,000
Awards, vesting period, in years			4
Number of company executives substantially ceasing active services to the company							1
Number of groups in which restricted stock units are segregated									5
Number of employees with modified equity based compensation awards			4