Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Assets within Defined Benefit Pension Plans Invested) (Details) - Pension Plans [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value of Plan Assets	$ 329,796	$ 325,790	$ 398,468
Cash and Cash Equivalents [Member]
Fair Value of Plan Assets	4,269	5,571
Global Equities [Member]
Fair Value of Plan Assets	66,517	104,775
Fixed Income Securities [Member]
Fair Value of Plan Assets	241,911	172,909
Alternative Securities [Member]
Fair Value of Plan Assets	17,099	42,535
Level 1
Fair Value of Plan Assets	270,391	296,296
Level 1 | Cash and Cash Equivalents [Member]
Fair Value of Plan Assets	4,269	5,571
Level 1 | Global Equities [Member]
Fair Value of Plan Assets	66,517	104,775
Level 1 | Fixed Income Securities [Member]
Fair Value of Plan Assets	182,506	143,415
Level 1 | Alternative Securities [Member]
Fair Value of Plan Assets	17,099	42,535
Level 2 [Member]
Fair Value of Plan Assets	59,405	29,494
Level 2 [Member] | Fixed Income Securities [Member]
Fair Value of Plan Assets	$ 59,405	$ 29,494