Pension and OPEB - Periodic Cost (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended				5 Months Ended	6 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Pension Plan, Defined Benefit [Member]	Sep. 30, 2013 Pension Plan, Defined Benefit [Member]	Sep. 30, 2014 Pension Plan, Defined Benefit [Member]	Sep. 30, 2013 Pension Plan, Defined Benefit [Member]	Sep. 30, 2014 Other Postretirement Benefit Plan, Defined Benefit [Member]	Sep. 30, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member]	Sep. 30, 2014 Other Postretirement Benefit Plan, Defined Benefit [Member]	Sep. 30, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member]	Jun. 30, 2014 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Sep. 30, 2014 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Sep. 30, 2013 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Jun. 30, 2013 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Mar. 31, 2013 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	May 31, 2014 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Jun. 30, 2014 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2013 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2012 Change in Assumptions for Pension Plans [Member] Pension Plan, Defined Benefit [Member]	Sep. 30, 2014 Change in Assumptions for Pension Plans [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Dec. 31, 2013 Change in Assumptions for Pension Plans [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Sep. 30, 2013 Discontinued Operations [Member] Pension Plan, Defined Benefit [Member]	Sep. 30, 2013 Discontinued Operations [Member] Pension Plan, Defined Benefit [Member]	Sep. 30, 2013 Discontinued Operations [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Sep. 30, 2013 Discontinued Operations [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Sep. 30, 2014 Change in Assumptions for Pension Plans [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Sep. 30, 2014 Change in Assumptions for Pension Plans [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost						$ 4,834,000	$ 4,897,000	$ 13,625,000	$ 16,184,000	$ 2,331,000	$ 4,849,000	$ 6,994,000	$ 14,547,000
Interest cost						8,667,000	9,497,000	26,812,000	27,249,000	12,096,000	29,619,000	36,290,000	88,856,000
Expected return on plan assets						(12,829,000)	(13,336,000)	(38,342,000)	(38,191,000)	0	0	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(2,542,000)	(8,212,000)	(7,625,000)	(24,635,000)		(346,000)	(408,000)	(1,038,000)	(1,223,000)	(2,196,000)	(7,804,000)	(6,588,000)	(23,411,000)
Amortization of actuarial gain	11,198,000	21,055,000	32,705,000	69,802,000		6,444,000	8,042,000	18,441,000	30,764,000	6,369,000	17,595,000	19,106,000	52,784,000
Other Comprehensive Income (Loss), Finalization of Pension and Non-Pension Postretirement Plan Valuation, Net of Tax	4,785,000	6,296,000	25,492,000	38,498,000		4,785,000	6,296,000	25,492,000	38,498,000	0	0	0	0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments						(549,000)	0	(549,000)	0	(35,633,000)	0	(35,633,000)	0
curtailment gain/loss OCI, net of tax								(347,000)															(22,508,000)
Curtailment Gain/Loss - Deferred Tax						(202,000)		(202,000)															(13,125,000)
Net periodic (benefit) cost	(22,741,000)	19,139,000	14,390,000	83,665,000		11,006,000	14,988,000	44,441,000	73,281,000	(17,033,000)	44,259,000	20,169,000	132,776,000												1,699,000	7,078,000	25,775,000	76,673,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate															4.33%	4.80%	4.84%	4.12%		4.26%	4.87%	4.00%		4.88%					1.92%	1.84%
Pension Contributions								25,948,000
Defined Benefit Plan, Curtailments	(36,182,000)	0	(36,182,000)	0				(21,624,000)				(315,439,000)
DB Plan Curtailment OCI, net of tax								13,659,000				199,252,000
Defined Benefit Plan, Plan Amendments														(6,490,000)	13,152,000	(21,264,000)	(48,957,000)	(29,916,000)	41,527,000				9,634,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(184,154,000)	(24,980,000)	(185,475,000)	(113,641,000)										5,141,000	(5,285,000)	17,040,000	33,414,000	35,261,000	(14,193,000)				(6,086,000)
Deferred Income Taxes			6,540,000	(23,335,000)																										(3,548,000.0000)
Deferred Income Taxes	127,731,000		127,731,000		211,303,000	7,965,000		7,965,000		116,187,000		116,187,000		2,998,000	(3,082,000)	10,520,000	20,630,000	21,770,000	(8,276,000)	2,998,000
Cash Transition Payment												46,282,000
Defined Benefit Plan, Benefits Paid												$ 46,272,000