Consolidated Balance Sheet by Industry Segment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Mar. 31, 2014		Dec. 31, 2013		Apr. 01, 2013
ASSETS:
Cash and cash equivalents	$ 729,023		$ 495,112		$ 601,615		$ 463,744
Reinsurance recoverables and trade receivables, net	197,640		199,322
Inventories, net	69,817		67,020
Prepaid expenses	94,076		55,269
Investments, fixed maturities and marketable equities	1,294,568		1,138,275
Investments, other	246,766		248,850
Deferred policy acquisition costs, net	116,191		118,707
Other assets	148,940		97,588
Related party assets	148,776		169,624
Subtotal assets	3,045,797		2,589,767
Investments in subsidiaries	0		0
Property, plant and equipment, at cost:
Land	457,229		405,177
Buildings and improvements	1,641,420		1,430,330
Furniture and equipment	344,016		322,088
Property, plant and equipment (gross)	5,751,913		5,141,717
Less: Accumulated depreciation	(1,891,178)		(1,732,506)
Total property, plant and equipment	3,860,735		3,409,211
Total assets	6,906,532		5,998,978		5,874,109
Liabilities:
Accounts payable and accrued expenses	353,564		357,954
Notes, loans and leases payable	2,364,513		1,942,359
Policy benefits and losses, claims and loss expenses payable	1,063,986		1,082,598
Liabilities from investment contracts	673,051		616,725
Other policyholders' funds and liabilities	10,469		7,988
Deferred income	14,605		31,390
Deferred income taxes	519,936		432,596
Related party liabilities	0		0
Total liabilities	5,000,124		4,471,610
Stockholders' equity:
Additional paid-in capital	449,156		444,210
Accumulated other comprehensive loss	(27,357)		(53,923)
Retained earnings	2,152,714		1,805,453
Unearned employee stock ownership plan shares	(952)		(1,219)
Total stockholders' equity	1,906,408		1,527,368
Total liabilities and stockholders' equity	6,906,532		5,998,978
Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	428,197		373,325
Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	2,881,051		2,610,797
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued
Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued
Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	10,497		10,497
Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(525,653)		(525,653)
Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(151,997)		(151,997)
Property and Casualty Insurance [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	3,301	[1]
Operating Segments [Member] | Moving and Storage Consolidations [Member]
ASSETS:
Cash and cash equivalents	713,702		464,710		571,420		427,560
Reinsurance recoverables and trade receivables, net	38,289		28,961
Inventories, net	69,817		67,020
Prepaid expenses	94,076		55,269
Investments, fixed maturities and marketable equities	0		0
Investments, other	31,229		32,850
Deferred policy acquisition costs, net	0		0
Other assets	145,436		93,857
Related party assets	150,411		172,507
Subtotal assets	1,242,960		915,174
Investments in subsidiaries	427,971		373,490
Property, plant and equipment, at cost:
Land	457,229		405,177
Buildings and improvements	1,641,420		1,430,330
Furniture and equipment	344,016		322,088
Property, plant and equipment (gross)	5,751,913		5,141,717
Less: Accumulated depreciation	(1,891,178)		(1,732,506)
Total property, plant and equipment	3,860,735		3,409,211
Total assets	5,531,666		4,697,875
Liabilities:
Accounts payable and accrued expenses	345,136		356,211
Notes, loans and leases payable	2,364,513		1,942,359
Policy benefits and losses, claims and loss expenses payable	365,020		370,668
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	14,605		31,390
Deferred income taxes	522,173		455,295
Related party liabilities	13,811		14,584
Total liabilities	3,625,258		3,170,507
Stockholders' equity:
Additional paid-in capital	449,366		444,420
Accumulated other comprehensive loss	(27,357)		(53,923)
Retained earnings	2,152,504		1,805,243
Unearned employee stock ownership plan shares	(952)		(1,219)
Total stockholders' equity	1,906,408		1,527,368
Total liabilities and stockholders' equity	5,531,666		4,697,875
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	428,197		373,325
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	2,881,051		2,610,797
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	10,497		10,497
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(525,653)		(525,653)
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(151,997)		(151,997)
Operating Segments [Member] | Property and Casualty Insurance [Member]
ASSETS:
Cash and cash equivalents	10,259	[2]	12,758	[2]	5,601	[3]	14,120	[3]
Reinsurance recoverables and trade receivables, net	125,234	[4]	142,335	[1]
Inventories, net	0	[4]	0	[1]
Prepaid expenses	0	[4]	0	[1]
Investments, fixed maturities and marketable equities	216,455	[4]	192,173	[1]
Investments, other	54,277	[4]	54,674	[1]
Deferred policy acquisition costs, net	0	[4]	0	[1]
Other assets	917	[4]	1,991	[1]
Related party assets	14,084	[4]	13,011	[1]
Subtotal assets	421,226	[4]	416,942	[1]
Investments in subsidiaries	0	[4]	0	[1]
Property, plant and equipment, at cost:
Land	0	[4]	0	[1]
Buildings and improvements	0	[4]	0	[1]
Furniture and equipment	0	[4]	0	[1]
Property, plant and equipment (gross)	0	[4]	0	[1]
Less: Accumulated depreciation	0	[4]	0	[1]
Total property, plant and equipment	0	[4]	0	[1]
Total assets	421,226	[4]	416,942	[1]
Liabilities:
Accounts payable and accrued expenses	0	[4]	0	[1]
Notes, loans and leases payable	0	[4]	0	[1]
Policy benefits and losses, claims and loss expenses payable	273,303	[4]	295,216	[1]
Liabilities from investment contracts	0	[4]	0	[1]
Other policyholders' funds and liabilities	4,879	[4]	3,732	[1]
Deferred income	0	[4]	0	[1]
Deferred income taxes	(22,657)	[4]	(30,440)	[1]
Related party liabilities	2,058	[4]	1,647	[1]
Total liabilities	257,583	[4]	270,155	[1]
Stockholders' equity:
Additional paid-in capital	91,120	[4]	91,120	[1]
Accumulated other comprehensive loss	6,980	[4]	1,782	[1]
Retained earnings	62,242	[4]	50,584	[1]
Unearned employee stock ownership plan shares	0	[4]	0	[1]
Total stockholders' equity	163,643	[4]	146,787	[1]
Total liabilities and stockholders' equity	421,226	[4]	416,942	[1]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0	[4]	0	[1]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0	[4]	0	[1]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	[4]	0	[1]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	[4]	0	[1]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0	[4]	0	[1]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued			3,301	[4]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0	[4]	0	[1]
Operating Segments [Member] | Property and Casualty Insurance [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0	[4]	0	[1]
Operating Segments [Member] | Life Insurance [Member]
ASSETS:
Cash and cash equivalents	5,062	[2]	17,644	[2]	24,594	[3]	22,064	[3]
Reinsurance recoverables and trade receivables, net	34,117	[4]	28,026	[1]
Inventories, net	0	[4]	0	[1]
Prepaid expenses	0	[4]	0	[1]
Investments, fixed maturities and marketable equities	1,078,113	[4]	946,102	[1]
Investments, other	161,260	[4]	161,326	[1]
Deferred policy acquisition costs, net	116,191	[4]	118,707	[1]
Other assets	2,587	[4]	1,740	[1]
Related party assets	543	[4]	515	[1]
Subtotal assets	1,397,873	[4]	1,274,060	[1]
Investments in subsidiaries	0	[4]	0	[1]
Property, plant and equipment, at cost:
Land	0	[4]	0	[1]
Buildings and improvements	0	[4]	0	[1]
Furniture and equipment	0	[4]	0	[1]
Property, plant and equipment (gross)	0	[4]	0	[1]
Less: Accumulated depreciation	0	[4]	0	[1]
Total property, plant and equipment	0	[4]	0	[1]
Total assets	1,397,873	[4]	1,274,060	[1]
Liabilities:
Accounts payable and accrued expenses	8,428	[4]	1,743	[1]
Notes, loans and leases payable	0	[4]	0	[1]
Policy benefits and losses, claims and loss expenses payable	425,663	[4]	416,714	[1]
Liabilities from investment contracts	673,051	[4]	616,725	[1]
Other policyholders' funds and liabilities	5,590	[4]	4,256	[1]
Deferred income	0	[4]	0	[1]
Deferred income taxes	20,420	[4]	7,741	[1]
Related party liabilities	393	[4]	178	[1]
Total liabilities	1,133,545	[4]	1,047,357	[1]
Stockholders' equity:
Additional paid-in capital	26,271	[4]	26,271	[1]
Accumulated other comprehensive loss	27,730	[4]	4,210	[1]
Retained earnings	207,827	[4]	193,722	[1]
Unearned employee stock ownership plan shares	0	[4]	0	[1]
Total stockholders' equity	264,328	[4]	226,703	[1]
Total liabilities and stockholders' equity	1,397,873	[4]	1,274,060	[1]
Operating Segments [Member] | Life Insurance [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0	[4]	0	[1]
Operating Segments [Member] | Life Insurance [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0	[4]	0	[1]
Operating Segments [Member] | Life Insurance [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	[4]	0	[1]
Operating Segments [Member] | Life Insurance [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0	[4]	0	[1]
Operating Segments [Member] | Life Insurance [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0	[4]	0	[1]
Operating Segments [Member] | Life Insurance [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	2,500	[1]	2,500	[4]
Operating Segments [Member] | Life Insurance [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0	[4]	0	[1]
Operating Segments [Member] | Life Insurance [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0	[4]	0	[1]
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member]
ASSETS:
Cash and cash equivalents	335,559		321,544		476,551		327,119
Reinsurance recoverables and trade receivables, net	0		0
Inventories, net	0		0
Prepaid expenses	42,815		18,537
Investments, fixed maturities and marketable equities	0		0
Investments, other	0		0
Deferred policy acquisition costs, net	0		0
Other assets	37,056		159
Related party assets	1,180,920		1,150,671
Subtotal assets	1,596,350		1,490,911
Investments in subsidiaries	833,496		493,612
Property, plant and equipment, at cost:
Land	0		0
Buildings and improvements	0		0
Furniture and equipment	72		72
Property, plant and equipment (gross)	72		72
Less: Accumulated depreciation	(59)		(56)
Total property, plant and equipment	13		16
Total assets	2,429,859		1,984,539
Liabilities:
Accounts payable and accrued expenses	326		657
Notes, loans and leases payable	0		0
Policy benefits and losses, claims and loss expenses payable	0		0
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	0		0
Deferred income taxes	522,173		455,295
Related party liabilities	0		0
Total liabilities	522,499		455,952
Stockholders' equity:
Additional paid-in capital	449,366		444,420
Accumulated other comprehensive loss	(27,357)		(53,923)
Retained earnings	2,152,504		1,805,243
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	1,907,360		1,528,587
Total liabilities and stockholders' equity	2,429,859		1,984,539
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	10,497		10,497
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(525,653)		(525,653)
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	(151,997)		(151,997)
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member]
ASSETS:
Cash and cash equivalents	374,043		140,844		92,695		98,926
Reinsurance recoverables and trade receivables, net	38,112		28,784
Inventories, net	69,817		67,020
Prepaid expenses	50,056		36,236
Investments, fixed maturities and marketable equities	0		0
Investments, other	0		1,653
Deferred policy acquisition costs, net	0		0
Other assets	64,092		59,746
Related party assets	93,561		115,657
Subtotal assets	689,681		449,940
Investments in subsidiaries	0		0
Property, plant and equipment, at cost:
Land	66,792		56,242
Buildings and improvements	281,461		205,762
Furniture and equipment	323,753		311,053
Property, plant and equipment (gross)	3,981,254		3,557,179
Less: Accumulated depreciation	(1,496,451)		(1,349,920)
Total property, plant and equipment	2,484,803		2,207,259
Total assets	3,174,484		2,657,199
Liabilities:
Accounts payable and accrued expenses	338,920		351,050
Notes, loans and leases payable	1,305,089		1,060,240
Policy benefits and losses, claims and loss expenses payable	365,020		370,668
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	14,594		31,390
Deferred income taxes	0		0
Related party liabilities	607,678		588,919
Total liabilities	2,631,301		2,402,267
Stockholders' equity:
Additional paid-in capital	121,230		121,230
Accumulated other comprehensive loss	(62,067)		(59,914)
Retained earnings	484,971		194,834
Unearned employee stock ownership plan shares	(952)		(1,219)
Total stockholders' equity	543,183		254,932
Total liabilities and stockholders' equity	3,174,484		2,657,199
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	428,197		373,325
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	2,881,051		2,610,797
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	1		1
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member]
ASSETS:
Cash and cash equivalents	4,100		2,322		2,174		1,515
Reinsurance recoverables and trade receivables, net	177		177
Inventories, net	0		0
Prepaid expenses	1,205		496
Investments, fixed maturities and marketable equities	0		0
Investments, other	31,229		31,197
Deferred policy acquisition costs, net	0		0
Other assets	44,288		33,952
Related party assets	9		9
Subtotal assets	81,008		68,153
Investments in subsidiaries	0		0
Property, plant and equipment, at cost:
Land	390,437		348,935
Buildings and improvements	1,359,959		1,224,568
Furniture and equipment	20,191		10,963
Property, plant and equipment (gross)	1,770,587		1,584,466
Less: Accumulated depreciation	(394,668)		(382,530)
Total property, plant and equipment	1,375,919		1,201,936
Total assets	1,456,927		1,270,089
Liabilities:
Accounts payable and accrued expenses	5,890		4,504
Notes, loans and leases payable	1,059,424		882,119
Policy benefits and losses, claims and loss expenses payable	0		0
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	11		0
Deferred income taxes	0		0
Related party liabilities	530,212		519,495
Total liabilities	1,595,537		1,406,118
Stockholders' equity:
Additional paid-in capital	147,941		147,941
Accumulated other comprehensive loss	0		0
Retained earnings	(286,552)		(283,971)
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	(138,610)		(136,029)
Total liabilities and stockholders' equity	1,456,927		1,270,089
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	1		1
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member]
ASSETS:
Cash and cash equivalents	0		0		0		0
Reinsurance recoverables and trade receivables, net	0		0
Inventories, net	0		0
Prepaid expenses	0		0
Investments, fixed maturities and marketable equities	0		0
Investments, other	0		0
Deferred policy acquisition costs, net	0		0
Other assets	0		0
Related party assets	(1,124,079)	[5]	(1,093,830)	[5]
Subtotal assets	(1,124,079)		(1,093,830)
Investments in subsidiaries	(405,525)	[6]	(120,122)	[6]
Property, plant and equipment, at cost:
Land	0		0
Buildings and improvements	0		0
Furniture and equipment	0		0
Property, plant and equipment (gross)	0		0
Less: Accumulated depreciation	0		0
Total property, plant and equipment	0		0
Total assets	(1,529,604)		(1,213,952)
Liabilities:
Accounts payable and accrued expenses	0		0
Notes, loans and leases payable	0		0
Policy benefits and losses, claims and loss expenses payable	0		0
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	0		0
Deferred income taxes	0		0
Related party liabilities	(1,124,079)	[5]	(1,093,830)	[5]
Total liabilities	(1,124,079)		(1,093,830)
Stockholders' equity:
Additional paid-in capital	(269,171)	[6]	(269,171)	[6]
Accumulated other comprehensive loss	62,067	[6]	59,914	[6]
Retained earnings	(198,419)	[6]	89,137	[6]
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	(405,525)		(120,122)
Total liabilities and stockholders' equity	(1,529,604)		(1,213,952)
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	(2)	[6]	(2)	[6]
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Consolidation, Eliminations [Member]
ASSETS:
Cash and cash equivalents	0		0		0		0
Reinsurance recoverables and trade receivables, net	0		0
Inventories, net	0		0
Prepaid expenses	0		0
Investments, fixed maturities and marketable equities	0		0
Investments, other	0		0
Deferred policy acquisition costs, net	0		0
Other assets	0		0
Related party assets	(16,262)	[5]	(16,409)	[5]
Subtotal assets	(16,262)		(16,409)
Investments in subsidiaries	(427,971)	[6]	(373,490)	[6]
Property, plant and equipment, at cost:
Land	0		0
Buildings and improvements	0		0
Furniture and equipment	0		0
Property, plant and equipment (gross)	0		0
Less: Accumulated depreciation	0		0
Total property, plant and equipment	0		0
Total assets	(444,233)		(389,899)
Liabilities:
Accounts payable and accrued expenses	0		0
Notes, loans and leases payable	0		0
Policy benefits and losses, claims and loss expenses payable	0		0
Liabilities from investment contracts	0		0
Other policyholders' funds and liabilities	0		0
Deferred income	0		0
Deferred income taxes	0		0
Related party liabilities	(16,262)	[5]	(16,409)	[5]
Total liabilities	(16,262)		(16,409)
Stockholders' equity:
Additional paid-in capital	(117,601)	[6]	(117,601)	[6]
Accumulated other comprehensive loss	(34,710)	[6]	(5,992)	[6]
Retained earnings	(269,859)	[6]	(244,096)	[6]
Unearned employee stock ownership plan shares	0		0
Total stockholders' equity	(427,971)		(373,490)
Total liabilities and stockholders' equity	(444,233)		(389,899)
Consolidation, Eliminations [Member] | Rental Trailers and Other Rental Equipment [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Consolidation, Eliminations [Member] | Rental Trucks [Member]
Property, plant and equipment, at cost:
Property subject to or available for operating lease, gross	0		0
Consolidation, Eliminations [Member] | Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Consolidation, Eliminations [Member] | Series B Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value, issued	0		0
Consolidation, Eliminations [Member] | Series A Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	0		0
Consolidation, Eliminations [Member] | Amerco Common Stock [Member]
Stockholders' equity:
Common stock, value, issued	(5,801)	[6]	(5,801)	[6]
Consolidation, Eliminations [Member] | Common Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	0		0
Consolidation, Eliminations [Member] | Preferred Stock in Treasury [Member]
Stockholders' equity:
Treasury stock, value	$ 0		$ 0

[1] Balances as of December 31, 2013

[2] Balance for the period ended September 30, 2014

[3] Balance for the period ended September 30, 2013

[4] Balances as of September 30, 2014

[5] Eliminate intercompany receivables and payables

[6] Eliminate investment in subsidiaries