Summary of Significant Accounting Policies - Schedule of Accumulated Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated Other Comprehensive Income (Loss), before Taxes	$ (127,876)	$ 8,407	$ 1,259
Income tax benefit	87,533	65,219	58,020
Total accumulated other comprehensive (loss) income	(40,343)	73,626	59,279
Foreign currency hedges and translation
Accumulated Other Comprehensive Income (Loss), before Taxes	93,669	168,935	141,064
Interest rate hedges
Accumulated Other Comprehensive Income (Loss), before Taxes	(2,088)	(927)	(952)
Pensions and other postretirement benefits
Accumulated Other Comprehensive Income (Loss), before Taxes	(220,081)	(158,079)	(138,853)
Unrealized gain (loss), net on available-for-sale securities
Accumulated Other Comprehensive Income (Loss), before Taxes	1,338	(1,297)	0
Other
Accumulated Other Comprehensive Income (Loss), before Taxes	$ (714)	$ (225)	$ 0