Pensions and Other Postretirement Plans (Total Benefit/Cost) (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 22,991	$ 22,656	$ 20,422
Special separation benefit expense		13,781
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Current year actuarial gain (loss)	(519,595)	(365,164)	(231,104)
Current year prior service cost	2	69	5,725
Amortization of prior service credit (cost)	(3,170)	(2,680)	4,142
Recognized net actuarial gain (loss)	5,486	(1,219)	2,046
Curtailments and settlements	120	0	91,676
Total Recognized in Other Comprehensive Income (Before Tax Effects)	(517,157)	(368,994)	(127,515)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	22,991	22,656	20,422
Interest cost	26,917	32,587	46,821
Expected return on assets	(137,878)	(113,427)	(122,790)
Amortization of prior service cost (credit)	2,846	2,830	2,882
Recognized actuarial loss (gain)	(7,906)	0	0
Net Periodic Cost (Benefit) for the Year	(93,030)	(55,354)	(52,665)
Settlement	0	0	(91,676)
Special separation benefit expense	1,132	13,781	6,432
Total Cost (Benefit) for the Year	(91,898)	(41,573)	(137,909)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Current year actuarial gain (loss)	(511,373)	(371,621)	(245,402)
Current year prior service cost	2	69	5,725
Amortization of prior service credit (cost)	(2,846)	(2,830)	(2,882)
Recognized net actuarial gain (loss)	7,906	0	0
Curtailments and settlements	0	0	91,676
Total Recognized in Other Comprehensive Income (Before Tax Effects)	(506,311)	(374,382)	(150,883)
Total Recognized in Total (Benefit) Cost and Other Comprehensive Income (Before Tax Effects)	(598,209)	(415,955)	(288,792)
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,022	954	858
Interest cost	2,943	3,678	4,314
Amortization of prior service cost (credit)	331	331	339
Recognized actuarial loss (gain)	5,930	5,267	2,314
Total Cost (Benefit) for the Year	10,226	10,230	7,825
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Current year actuarial gain (loss)	(7,640)	7,448	15,544
Amortization of prior service credit (cost)	(331)	(331)	(339)
Recognized net actuarial gain (loss)	(5,930)	(5,267)	(2,314)
Total Recognized in Other Comprehensive Income (Before Tax Effects)	(13,901)	1,850	12,891
Total Recognized in Total (Benefit) Cost and Other Comprehensive Income (Before Tax Effects)	(3,675)	12,080	20,716
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	92	167	289
Amortization of prior service cost (credit)	(7)	(481)	(7,363)
Recognized actuarial loss (gain)	(3,510)	(4,048)	(4,360)
Net Periodic Cost (Benefit) for the Year	(3,425)	(4,362)	(11,434)
Settlement	(120)	0	0
Total Cost (Benefit) for the Year	(3,545)	(4,362)	(11,434)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Current year actuarial gain (loss)	(582)	(991)	(1,246)
Amortization of prior service credit (cost)	7	481	7,363
Recognized net actuarial gain (loss)	3,510	4,048	4,360
Curtailments and settlements	120	0	0
Total Recognized in Other Comprehensive Income (Before Tax Effects)	3,055	3,538	10,477
Total Recognized in Total (Benefit) Cost and Other Comprehensive Income (Before Tax Effects)	$ (490)	$ (824)	$ (957)