Comprehensive Income (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2010	Dec. 31, 2009	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Comprehensive Income Disclosure [Abstract]
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest	$ (173,844,000)	$ 12,250,000	$ (77,558,000)	$ 619,731,000	$ 161,600,000
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation			(75,332,000)	(2,726,000)
Unrealized gain on derivative instruments, net of tax			254,000	1,172,000
Unrealized gain on available for sale securities, net of tax			469,000	1,066,000
Defined pension and post-retirement benefit costs, net of tax			(276,136,000)	(12,817,000)
Accumulated other comprehensive loss			(350,745,000)	(13,305,000)
Accumulated Other Comprehensive Income (Loss) Tax Expense (Benefit) [Abstract]
Unrealized gain on derivative instruments, tax expense			(152,000)	(764,000)
Unrealized gain on available for sale securities, tax expense			(182,000)	(101,000)
Defined pension and post-retirement benefit costs, tax benefit			$ 139,901,000	$ 4,700,000