Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Fair Value Of Pension Plan and Postretirement Healthcare Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Plan Assets [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		$ 1,992,646
Pension Plan Assets [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	$ 1,841,967
Pension Plan Assets [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	1,139,076	1,244,422
Pension Plan Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	679,559	717,138
Pension Plan Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	23,332	31,086
Pension Plan Assets [Member] | Cash And Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		38,131
Pension Plan Assets [Member] | Cash And Cash Equivalents [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	33,539
Pension Plan Assets [Member] | Cash And Cash Equivalents [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	1,485	2,965
Pension Plan Assets [Member] | Cash And Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	32,054	35,166
Pension Plan Assets [Member] | Cash And Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Total Equity Holdings [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		1,173,044
Pension Plan Assets [Member] | Total Equity Holdings [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	1,071,702
Pension Plan Assets [Member] | Total Equity Holdings [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	1,045,493	1,137,747
Pension Plan Assets [Member] | Total Equity Holdings [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	2,877	4,211
Pension Plan Assets [Member] | Total Equity Holdings [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	23,332	31,086
Pension Plan Assets [Member] | U.S. Companies [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		625,174
Pension Plan Assets [Member] | U.S. Companies [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	574,826
Pension Plan Assets [Member] | U.S. Companies [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	571,949	620,964
Pension Plan Assets [Member] | U.S. Companies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	2,877	4,210
Pension Plan Assets [Member] | U.S. Companies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Foreign Companies [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		109,088
Pension Plan Assets [Member] | Foreign Companies [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	113,803
Pension Plan Assets [Member] | Foreign Companies [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	113,803	109,088
Pension Plan Assets [Member] | Foreign Companies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Foreign Companies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Harley-Davidson Common Stock [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		83,942
Pension Plan Assets [Member] | Harley-Davidson Common Stock [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	57,808
Pension Plan Assets [Member] | Harley-Davidson Common Stock [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	57,808	83,942
Pension Plan Assets [Member] | Harley-Davidson Common Stock [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Harley-Davidson Common Stock [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Pooled Equity Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		323,613
Pension Plan Assets [Member] | Pooled Equity Funds [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	301,824
Pension Plan Assets [Member] | Pooled Equity Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	301,824	323,613
Pension Plan Assets [Member] | Pooled Equity Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Pooled Equity Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Equity Securities, Private Equity/Real Estate [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		31,227
Pension Plan Assets [Member] | Equity Securities, Private Equity/Real Estate [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	23,441
Pension Plan Assets [Member] | Equity Securities, Private Equity/Real Estate [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	109	140
Pension Plan Assets [Member] | Equity Securities, Private Equity/Real Estate [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	1
Pension Plan Assets [Member] | Equity Securities, Private Equity/Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	23,332	31,086	$ 34,234
Pension Plan Assets [Member] | Total Fixed Income Holdings [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		781,471
Pension Plan Assets [Member] | Total Fixed Income Holdings [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	736,726
Pension Plan Assets [Member] | Total Fixed Income Holdings [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	92,098	103,710
Pension Plan Assets [Member] | Total Fixed Income Holdings [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	644,628	677,761
Pension Plan Assets [Member] | Total Fixed Income Holdings [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | U.S. Treasuries [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		51,375
Pension Plan Assets [Member] | U.S. Treasuries [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	42,827
Pension Plan Assets [Member] | U.S. Treasuries [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	42,827	51,375
Pension Plan Assets [Member] | U.S. Treasuries [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | U.S. Treasuries [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Federal Agencies [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		45,282
Pension Plan Assets [Member] | Federal Agencies [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	43,695
Pension Plan Assets [Member] | Federal Agencies [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Federal Agencies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	43,695	45,282
Pension Plan Assets [Member] | Federal Agencies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Corporate Bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		376,454
Pension Plan Assets [Member] | Corporate Bonds [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	388,439
Pension Plan Assets [Member] | Corporate Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	388,439	376,454
Pension Plan Assets [Member] | Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Pooled Fixed Income Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		236,024
Pension Plan Assets [Member] | Pooled Fixed Income Funds [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	184,142
Pension Plan Assets [Member] | Pooled Fixed Income Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	49,271	52,335
Pension Plan Assets [Member] | Pooled Fixed Income Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	134,871	183,689
Pension Plan Assets [Member] | Pooled Fixed Income Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Foreign Bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		58,956
Pension Plan Assets [Member] | Foreign Bonds [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	64,533
Pension Plan Assets [Member] | Foreign Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Foreign Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	64,533	58,956
Pension Plan Assets [Member] | Foreign Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Municipal Bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets		13,380
Pension Plan Assets [Member] | Municipal Bonds [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	13,090
Pension Plan Assets [Member] | Municipal Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Pension Plan Assets [Member] | Municipal Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	13,090	13,380
Pension Plan Assets [Member] | Municipal Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	156,765	156,840	147,875
Postretirement Healthcare Benefits [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	121,864	128,287
Postretirement Healthcare Benefits [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	30,010	24,684
Postretirement Healthcare Benefits [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	4,891	3,869
Postretirement Healthcare Benefits [Member] | Cash And Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	6,068	8,033
Postretirement Healthcare Benefits [Member] | Cash And Cash Equivalents [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	2,980	7,278
Postretirement Healthcare Benefits [Member] | Cash And Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	3,088	755
Postretirement Healthcare Benefits [Member] | Cash And Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Total Equity Holdings [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	113,662	113,942
Postretirement Healthcare Benefits [Member] | Total Equity Holdings [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	108,353	109,552
Postretirement Healthcare Benefits [Member] | Total Equity Holdings [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	418	521
Postretirement Healthcare Benefits [Member] | Total Equity Holdings [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	4,891	3,869
Postretirement Healthcare Benefits [Member] | U.S. Companies [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	74,083	75,349
Postretirement Healthcare Benefits [Member] | U.S. Companies [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	74,083	75,349
Postretirement Healthcare Benefits [Member] | U.S. Companies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | U.S. Companies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Foreign Companies [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	17,267	15,571
Postretirement Healthcare Benefits [Member] | Foreign Companies [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	16,849	15,050
Postretirement Healthcare Benefits [Member] | Foreign Companies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	418	521
Postretirement Healthcare Benefits [Member] | Foreign Companies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Pooled Equity Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	17,410	19,138
Postretirement Healthcare Benefits [Member] | Pooled Equity Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	17,410	19,138
Postretirement Healthcare Benefits [Member] | Pooled Equity Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Pooled Equity Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Equity Securities, Private Equity/Real Estate [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	4,902	3,884
Postretirement Healthcare Benefits [Member] | Equity Securities, Private Equity/Real Estate [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	11	15
Postretirement Healthcare Benefits [Member] | Equity Securities, Private Equity/Real Estate [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Equity Securities, Private Equity/Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	4,891	3,869	$ 0
Postretirement Healthcare Benefits [Member] | Total Fixed Income Holdings [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	37,035	34,865
Postretirement Healthcare Benefits [Member] | Total Fixed Income Holdings [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	10,531	11,457
Postretirement Healthcare Benefits [Member] | Total Fixed Income Holdings [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	26,504	23,408
Postretirement Healthcare Benefits [Member] | Total Fixed Income Holdings [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | U.S. Treasuries [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	10,531	11,457
Postretirement Healthcare Benefits [Member] | U.S. Treasuries [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	10,531	11,457
Postretirement Healthcare Benefits [Member] | U.S. Treasuries [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | U.S. Treasuries [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Federal Agencies [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	6,508	1,876
Postretirement Healthcare Benefits [Member] | Federal Agencies [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Federal Agencies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	6,508	1,876
Postretirement Healthcare Benefits [Member] | Federal Agencies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Corporate Bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	10,270	11,549
Postretirement Healthcare Benefits [Member] | Corporate Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	10,270	11,549
Postretirement Healthcare Benefits [Member] | Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Pooled Fixed Income Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	8,305	8,996
Postretirement Healthcare Benefits [Member] | Pooled Fixed Income Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Pooled Fixed Income Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	8,305	8,996
Postretirement Healthcare Benefits [Member] | Pooled Fixed Income Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Foreign Bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	890	770
Postretirement Healthcare Benefits [Member] | Foreign Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Foreign Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	890	770
Postretirement Healthcare Benefits [Member] | Foreign Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Municipal Bonds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	531	217
Postretirement Healthcare Benefits [Member] | Municipal Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	0	0
Postretirement Healthcare Benefits [Member] | Municipal Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	531	217
Postretirement Healthcare Benefits [Member] | Municipal Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total pension plan assets	$ 0	$ 0