Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 8,557		$ 9,048		$ 17,377		$ 18,008
Income tax on unrealized gains on available-for-sale securities reclassified out of accumulated other comprehensive income	106,424		133		106,110		353
Other income (expense), net	(268,114)		12,858		(401,387)		16,941
Amortization of net prior service credit included in net income	(102)		(384)		(204)		(821)
Amortization of net actuarial (gain) loss included in net income	(7,425)		2,004		(14,607)		4,321
Settlement gain included in net income	0		0		0		3,471
Income Before Tax	(446,185)		(78,785)		(654,818)		(116,817)
Provision for Income Taxes	76,800		31,700		154,200		47,500
Income Net of Tax	(369,385)		(47,085)		(500,618)		(69,317)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income Net of Tax	(164,021)		890		(167,794)		(284)
Unrealized Gain on Available-for-Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income tax on unrealized gains on available-for-sale securities reclassified out of accumulated other comprehensive income	106,424	[1]	133	[1]	106,110	[1]	353	[1]
Other income (expense), net	(266,059)		(333)		(265,274)		(884)
Provision for Income Taxes	900				1,200
Income Net of Tax	(159,635)		(200)		(159,164)		(531)
Unrealized Gain on Available-for-Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Berkshire Exchange Transaction [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income tax on unrealized gains on available-for-sale securities reclassified out of accumulated other comprehensive income	107,300				107,300
Pension and Other Postretirement Plans [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Amortization of net prior service credit included in net income	(102)	[2]	(384)	[2]	(204)	[2]	(821)	[2]
Amortization of net actuarial (gain) loss included in net income	(7,425)	[2]	2,004	[2]	(14,607)	[2]	4,321	[2]
Settlement gain included in net income	0	[2]	0	[2]	0	[2]	(3,471)	[2]
Income Before Tax	(7,527)		1,620		(14,811)		29
Provision for Income Taxes	3,011		(648)		5,924		(12)
Income Net of Tax	(4,516)		972		(8,887)		17
Cash Flow Hedge [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	216		197		428		383
Provision for Income Taxes	(86)		(79)		(171)		(153)
Income Net of Tax	$ 130		$ 118		$ 257		$ 230

[1] Benefits of $0.9 million and $1.2 million were recorded in Provision for Income Taxes related to the realized loss for the three and six months ended June 30, 2014, respectively. The remaining $107.3 million for the three and six months ended June 30, 2014, relates to the reversal of income taxes previously recorded on the unrealized gain of the Company’s investment in Berkshire Hathaway Inc. marketable equity securities as part of the Berkshire exchange transaction (see Note 4). The amounts for the three and six months ended June 30, 2013 were recorded in Provision for Income Taxes.

[2] These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement plan cost (see Note 9).