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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2011
Accounting Policies [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income consists of the following as of December 31:
 
2011
 
2010
 
2009
Foreign currency hedges and translation
$
93,669

 
$
168,935

 
$
141,064

Interest rate hedges
(2,088
)
 
(927
)
 
(952
)
Pensions and other postretirement benefits
(220,081
)
 
(158,079
)
 
(138,853
)
Unrealized gain (loss), net on available-for-sale securities
1,338

 
(1,297
)
 
—

Other
(714
)
 
(225
)
 
—

 
(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