Income Tax (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Before Income Tax Domestic And Foreign [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Domestic									$ 644,219,000	$ 400,278,000	$ 500,938,000
Income (Loss) from Continuing Operations before Income Taxes, Foreign									275,004,000	363,293,000	305,243,000
Income Loss From Continuing Operations Before Provision For Income Tax	$ 321,089,000	$ 201,479,000	$ 215,892,000	$ 180,763,000	$ 193,251,000	$ 156,396,000	$ 187,169,000	$ 226,755,000	$ 919,223,000	$ 763,571,000	$ 806,181,000