Honda Motor (HMC) 6-K 25 Feb 22 Current report (foreign) Financial data

Cover Page

Cover Page	9 Months Ended
	Dec. 31, 2021
Document Information [Line Items]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2021
Entity Registrant Name	HONDA MOTOR CO LTD
Entity Central Index Key	0000715153
Current Fiscal Year End Date	--03-31

Condensed Consolidated Interim

Condensed Consolidated Interim Statements of Financial Position - JPY (¥) ¥ in Millions	Dec. 31, 2021	Mar. 31, 2021
Current assets:
Cash and cash equivalents	¥ 2,690,451	¥ 2,758,020
Trade receivables	716,296	801,814
Receivables from financial services	1,613,208	1,794,654
Other financial assets	407,358	295,307
Inventories	1,799,424	1,545,600
Other current assets	368,076	383,696
Total current assets	7,594,813	7,579,091
Non-current assets:
Investments accounted for using the equity method	902,008	891,002
Receivables from financial services	3,674,233	3,619,896
Other financial assets	765,484	628,533
Intangible assets	822,570	818,763
Deferred tax assets	100,540	99,552
Other non-current assets	342,988	342,763
Total non-current assets	14,654,966	14,341,939
Total assets	22,249,779	21,921,030
Current liabilities:
Trade payables	1,033,941	1,088,061
Financing liabilities	3,103,481	3,005,624
Accrued expenses	297,558	415,106
Other financial liabilities	149,109	182,145
Income taxes payable	55,632	47,793
Provisions	262,373	362,151
Other current liabilities	616,044	614,577
Total current liabilities	5,518,138	5,715,457
Non-current liabilities:
Financing liabilities	4,486,260	4,715,361
Other financial liabilities	279,399	280,809
Retirement benefit liabilities	362,516	358,532
Provisions	252,876	278,890
Deferred tax liabilities	942,801	842,001
Other non-current liabilities	371,472	357,141
Total non-current liabilities	6,695,324	6,832,734
Total liabilities	12,213,462	12,548,191
Equity:
Common stock	86,067	86,067
Capital surplus	185,554	172,049
Treasury stock	(328,443)	(273,786)
Retained earnings	9,294,994	8,901,266
Other components of equity	532,690	196,710
Equity attributable to owners of the parent	9,770,862	9,082,306
Non-controlling interests	265,455	290,533
Total equity	10,036,317	9,372,839
Total liabilities and equity	22,249,779	21,921,030
Equipment on operating leases [member]
Non-current assets:
Property, plant and equipment	5,075,682	4,919,916
Property, plant and equipment [member]
Non-current assets:
Property, plant and equipment	¥ 2,971,461	¥ 3,021,514

Condensed Consolidated Interi_2

Condensed Consolidated Interim Statements of Income - JPY (¥) ¥ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Profit or loss [abstract]
Sales revenue	¥ 3,688,785	¥ 3,771,569	¥ 10,677,013	¥ 9,546,713
Operating costs and expenses:
Cost of sales	(2,924,975)	(2,940,964)	(8,486,750)	(7,594,521)
Selling, general and administrative	(329,644)	(381,019)	(955,247)	(1,004,211)
Research and development	(204,717)	(171,851)	(563,371)	(500,981)
Total operating costs and expenses	(3,459,336)	(3,493,834)	(10,005,368)	(9,099,713)
Operating profit	229,449	277,735	671,645	447,000
Share of profit of investments accounted for using the equity method	49,788	102,274	157,034	204,570
Finance income and finance costs:
Interest income	7,657	4,695	18,737	13,572
Interest expense	(3,241)	(2,014)	(9,669)	(8,563)
Other, net	1,189	3,733	7,491	2,128
Total finance income and finance costs	5,605	6,414	16,559	7,137
Profit before income taxes	284,842	386,423	845,238	658,707
Income tax expense	(77,240)	(87,094)	(229,035)	(186,809)
Profit for the period	207,602	299,329	616,203	471,898
Profit for the period attributable to:
Owners of the parent	192,960	284,051	582,169	444,102
Non-controlling interests	¥ 14,642	¥ 15,278	¥ 34,034	¥ 27,796
Earnings per share attributable to owners of the parent
Basic and diluted	¥ 112.42	¥ 164.51	¥ 337.92	¥ 257.21

Condensed Consolidated Interi_3

Condensed Consolidated Interim Statements of Comprehensive Income - JPY (¥) ¥ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Statement of comprehensive income [abstract]
Profit for the period	¥ 207,602	¥ 299,329	¥ 616,203	¥ 471,898
Items that will not be reclassified to profit or loss
Remeasurements of defined benefit plans
Net changes in revaluation of financial assets measured at fair value through other comprehensive income	20,742	45,754	78,760	64,000
Share of other comprehensive income of investments accounted for using the equity method	(1,207)	1,040	113	613
Items that may be reclassified subsequently to profit or loss
Net changes in revaluation of financial assets measured at fair value through other comprehensive income	(79)	13	(97)	127
Exchange differences on translating foreign operations	182,103	(36,418)	219,152	(114,008)
Share of other comprehensive income of investments accounted for using the equity method	16,709	5,297	43,385	5,772
Total other comprehensive income, net of tax	218,268	15,686	341,313	(43,496)
Comprehensive income for the period	425,870	315,015	957,516	428,402
Comprehensive income for the period attributable to:
Owners of the parent	403,390	296,866	918,110	394,202
Non-controlling interests	¥ 22,480	¥ 18,149	¥ 39,406	¥ 34,200

Condensed Consolidated Interi_4

Condensed Consolidated Interim Statements of Changes in Equity - JPY (¥) ¥ in Millions	Total	Common stock [Member]	Capital surplus [Member]	Treasury stock [member]	Retained earnings [Member]	Other components of equity [member]	Equity attributable to owners of the parent [Member]	Non-controlling interests [Member]
Beginning balance at Mar. 31, 2020	¥ 8,286,023	¥ 86,067	¥ 171,823	¥ (273,940)	¥ 8,142,948	¥ (114,639)	¥ 8,012,259	¥ 273,764
Comprehensive income for the period
Profit for the period	471,898				444,102		444,102	27,796
Other comprehensive income, net of tax	(43,496)					(49,900)	(49,900)	6,404
Total comprehensive income for the period	428,402				444,102	(49,900)	394,202	34,200
Reclassification to retained earnings					353	(353)
Transactions with owners and other
Dividends paid	(140,947)				(100,181)		(100,181)	(40,766)
Purchases of treasury stock	(4)			(4)			(4)
Disposal of treasury stock	124			124			124
Share-based payment transactions	203		203				203
Equity transactions and others	2,251							2,251
Total transactions with owners and other	(138,373)		203	120	(100,181)		(99,858)	(38,515)
Ending balance at Dec. 31, 2020	8,576,052	86,067	172,026	(273,820)	8,487,222	(164,892)	8,306,603	269,449
Beginning balance at Mar. 31, 2021	9,372,839	86,067	172,049	(273,786)	8,901,266	196,710	9,082,306	290,533
Comprehensive income for the period
Profit for the period	616,203				582,169		582,169	34,034
Other comprehensive income, net of tax	341,313					335,941	335,941	5,372
Total comprehensive income for the period	957,516				582,169	335,941	918,110	39,406
Reclassification to retained earnings					(39)	39
Transactions with owners and other
Dividends paid	(231,550)				(188,402)		(188,402)	(43,148)
Purchases of treasury stock	(62,756)			(62,756)			(62,756)
Disposal of treasury stock	442			442			442
Share-based payment transactions	(174)		(174)				(174)
Equity transactions and others			13,679	7,657			21,336	(21,336)
Total transactions with owners and other	(294,038)		13,505	(54,657)	(188,402)		(229,554)	(64,484)
Ending balance at Dec. 31, 2021	¥ 10,036,317	¥ 86,067	¥ 185,554	¥ (328,443)	¥ 9,294,994	¥ 532,690	¥ 9,770,862	¥ 265,455

Condensed Consolidated Interi_5

Condensed Consolidated Interim Statements of Cash Flows - JPY (¥) ¥ in Millions	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Profit before income taxes	¥ 845,238	¥ 658,707
Depreciation, amortization and impairment losses excluding equipment on operating leases	457,989	444,545
Share of profit of investments accounted for using the equity method	(157,034)	(204,570)
Finance income and finance costs, net	(42,769)	52,741
Interest income and interest costs from financial services, net	(119,818)	(99,425)
Changes in assets and liabilities
Trade receivables	100,704	6,927
Inventories	(200,804)	88,067
Trade payables	(58,880)	78,928
Accrued expenses	(136,753)	(72,394)
Provisions and retirement benefit liabilities	(131,115)	86,077
Receivables from financial services	321,333	(11,553)
Equipment on operating leases	620	(118,989)
Other assets and liabilities	(35,454)	(151,391)
Other, net	(7,053)	(608)
Dividends received	110,049	119,642
Interest received	179,173	177,097
Interest paid	(69,296)	(83,502)
Income taxes paid, net of refunds	(108,326)	(144,107)
Net cash provided by operating activities	947,804	826,192
Cash flows from investing activities:
Payments for additions to property, plant and equipment	(198,762)	(227,151)
Payments for additions to and internally developed intangible assets	(126,575)	(165,830)
Proceeds from sales of property, plant and equipment and intangible assets	16,057	4,680
Payments for acquisitions of subsidiaries, net of cash and cash equivalents acquired		2,230
Payments for acquisitions of investments accounted for using the equity method		(110,747)
Proceeds from sales of investments accounted for using the equity method		10,376
Payments for acquisitions of other financial assets	(409,524)	(311,873)
Proceeds from sales and redemptions of other financial assets	337,025	134,639
Net cash used in investing activities	(381,779)	(663,676)
Cash flows from financing activities:
Proceeds from short-term financing liabilities	5,863,983	6,992,681
Repayments of short-term financing liabilities	(6,106,635)	(6,781,179)
Proceeds from long-term financing liabilities	1,229,804	1,356,619
Repayments of long-term financing liabilities	(1,328,446)	(1,304,276)
Dividends paid to owners of the parent	(188,402)	(100,181)
Dividends paid to non-controlling interests	(41,722)	(34,134)
Purchases and sales of treasury stock, net	(62,314)	120
Repayments of lease liabilities	(58,406)	(47,584)
Other, net		(555)
Net cash provided by (used in) financing activities	(692,138)	81,511
Effect of exchange rate changes on cash and cash equivalents	58,544	(43,091)
Net change in cash and cash equivalents	(67,569)	200,936
Cash and cash equivalents at beginning of year	2,758,020	2,672,353
Cash and cash equivalents at end of period	¥ 2,690,451	¥ 2,873,289

Reporting Entity

Reporting Entity	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Reporting Entity	(1) Reporting Entity Honda Motor Co., Ltd. (the “Company”) is a public company domiciled in Japan. The Company and its subsidiaries (collectively “Honda”) develop, manufacture and distribute motorcycles, automobiles, power products and others throughout the world, and also provide financial services to customers and dealers for the sale of those products. Principal manufacturing facilities are located in Japan, the United States of America, Canada, Mexico, Italy, France, China, India, Indonesia, Malaysia, Philippines, Thailand, Vietnam, Argentina and Brazil.

Basis of Preparation

Basis of Preparation	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Basis of Preparation	(2) Basis of Preparation (a) Compliance with Interim Financial Reporting Standards The condensed consolidated interim financial statements of the Company have been prepared in accordance with IAS 34 “Interim Financial Reporting”. The condensed consolidated interim financial statements should be read in conjunction with the Company’s consolidated financial statements for the fiscal year ended March 31, 2021, since the condensed consolidated interim financial statements do not include all the information required in the annual consolidated financial statements, which have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board. (b) Functional Currency and Presentation Currency The condensed consolidated interim financial statements are presented in Japanese yen, which is the functional currency of the Company. All financial information presented in Japanese yen has been rounded to the nearest million Japanese yen, except when otherwise indicated. (c) Use of Estimates and Judgments The preparation of condensed consolidated interim financial statements requires management to make judgments, estimates and assumptions that affect the application of accounting policies, the reported amount of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results could differ from these estimates. These estimates and underlying assumptions are reviewed on a continuous basis. Changes in these accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected. The condensed consolidated interim financial statements are prepared based on the same judgments and estimations as those applied and described in the Company’s consolidated financial statements for the fiscal year ended March 31, 2021.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Summary of Significant Accounting Policies	(3) Summary of Significant Accounting Policies The condensed consolidated interim financial statements are prepared based on the same accounting policies as those applied and described in the Company’s consolidated financial statements for the fiscal year ended March 31, 2021.

Segment Information

Segment Information	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Segment Information	(4) Segment Information Honda has four reportable segments: Motorcycle business, Automobile business, Financial services business and Life creation and other businesses, which are based on Honda’s organizational structure and characteristics of products and services. Operating segments are defined as the components of Honda for which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The accounting policies used for these reportable segments are consistent with the accounting policies used in the Company’s condensed consolidated interim financial statements. Principal products and services, and functions of each segment are as follows: Segment Principal products and services Functions Motorcycle Business Motorcycles, all-terrain side-by-sides Research and development Automobile Business Automobiles and relevant parts Research and development Financial Services Business Financial services Retail loan and lease related to Life Creation and Other Businesses Power products and relevant parts, and others Research and development (a) Segment Information Segment information as of and for the nine months ended December 31, 2020 and 2021 is as follows: As of and for the nine months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 1,258,173 ¥ 6,207,728 ¥ 1,853,641 ¥ 227,171 ¥ 9,546,713 ¥ — ¥ 9,546,713 Intersegment — 153,209 9,520 14,270 176,999 (176,999 ) — Total 1,258,173 6,360,937 1,863,161 241,441 9,723,712 (176,999 ) 9,546,713 Segment profit (loss) ¥ 152,379 ¥ 52,624 ¥ 250,581 ¥ (8,584 ) ¥ 447,000 ¥ — ¥ 447,000 Segment assets ¥ 1,382,083 ¥ 8,061,407 ¥ 10,280,529 ¥ 360,515 ¥ 20,084,534 ¥ 695,669 ¥ 20,780,203 Depreciation and amortization 50,324 378,524 617,238 11,484 1,057,570 — 1,057,570 Capital expenditures 28,358 348,446 1,485,375 7,004 1,869,183 — 1,869,183 As of and for the nine months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 1,602,096 ¥ 6,668,657 ¥ 2,114,335 ¥ 291,925 ¥ 10,677,013 ¥ — ¥ 10,677,013 Intersegment — 155,020 2,124 17,041 174,185 (174,185 ) — Total 1,602,096 6,823,677 2,116,459 308,966 10,851,198 (174,185 ) 10,677,013 Segment profit (loss) ¥ 232,395 ¥ 188,547 ¥ 258,149 ¥ (7,446 ) ¥ 671,645 ¥ — ¥ 671,645 Segment assets ¥ 1,465,871 ¥ 8,795,380 ¥ 10,914,940 ¥ 385,776 ¥ 21,561,967 ¥ 687,812 ¥ 22,249,779 Depreciation and amortization 49,127 381,128 661,252 12,728 1,104,235 — 1,104,235 Capital expenditures 30,189 287,082 1,639,003 10,501 1,966,775 — 1,966,775 Segment information for the three months ended December 31, 2020 and 2021 is as follows: For the three months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 490,857 ¥ 2,585,190 ¥ 614,549 ¥ 80,973 ¥ 3,771,569 ¥ — ¥ 3,771,569 Intersegment — 52,925 3,097 5,434 61,456 (61,456 ) — Total 490,857 2,638,115 617,646 86,407 3,833,025 (61,456 ) 3,771,569 Segment profit (loss) ¥ 72,715 ¥ 123,127 ¥ 85,715 ¥ (3,822 ) ¥ 277,735 ¥ — ¥ 277,735 For the three months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 578,366 ¥ 2,333,388 ¥ 671,777 ¥ 105,254 ¥ 3,688,785 ¥ — ¥ 3,688,785 Intersegment — 55,365 834 6,008 62,207 (62,207 ) — Total 578,366 2,388,753 672,611 111,262 3,750,992 (62,207 ) 3,688,785 Segment profit (loss) ¥ 84,258 ¥ 71,443 ¥ 81,335 ¥ (7,587 ) ¥ 229,449 ¥ — ¥ 229,449 Explanatory notes: 1. Segment profit (loss) of each segment is measured in a consistent manner with consolidated operating profit, which is profit before income taxes before share of profit of investments accounted for using the equity method and finance income and finance costs. Expenses not directly associated with specific segments are allocated based on the most reasonable measures applicable. 2. Segment assets of each segment are defined as total assets including investments accounted for using the equity method, derivatives, and deferred tax assets. Segment assets are based on those directly associated with each segment and those not directly associated with specific segments are allocated based on the most reasonable measures applicable except for the corporate assets described below. 3. Intersegment sales revenues are generally made at values that approximate arm’s-length 4. Reconciling items include elimination of intersegment transactions and balances as well as unallocated corporate assets. Unallocated corporate assets, included in reconciling items as of December 31, 2020 and 2021 amounted to ¥931,069 million and ¥847,711 million, respectively, which consist primarily of the Company’s cash and cash equivalents and financial assets measured at fair value through other comprehensive income. (b) Supplemental Geographical Information In addition to the disclosure required by IFRS, Honda provides the following supplemental information for the financial statements users: Supplemental geographical information based on the location of the Company and its subsidiaries As of and for the nine months ended December 31, 2020 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 1,559,844 ¥ 5,200,322 ¥ 350,963 ¥ 2,124,773 ¥ 310,811 ¥ 9,546,713 ¥ — ¥ 9,546,713 Inter-geographic areas 1,189,865 270,594 121,711 329,638 4,509 1,916,317 (1,916,317 ) — Total 2,749,709 5,470,916 472,674 2,454,411 315,320 11,463,030 (1,916,317 ) 9,546,713 Operating profit (loss) ¥ (31,386 ) ¥ 269,236 ¥ 18,352 ¥ 170,069 ¥ 421 ¥ 426,692 ¥ 20,308 ¥ 447,000 Assets ¥ 5,048,475 ¥ 11,271,264 ¥ 666,494 ¥ 2,996,726 ¥ 484,914 ¥ 20,467,873 ¥ 312,330 ¥ 20,780,203 Non-current ¥ 3,038,243 ¥ 4,637,887 ¥ 58,660 ¥ 643,185 ¥ 114,368 ¥ 8,492,343 ¥ — ¥ 8,492,343 As of and for the nine months ended December 31, 2021 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 1,713,992 ¥ 5,681,155 ¥ 440,255 ¥ 2,400,719 ¥ 440,892 ¥ 10,677,013 ¥ — ¥ 10,677,013 Inter-geographic areas 1,506,703 341,172 89,067 491,398 7,479 2,435,819 (2,435,819 ) — Total 3,220,695 6,022,327 529,322 2,892,117 448,371 13,112,832 (2,435,819 ) 10,677,013 Operating profit (loss) ¥ 26,663 ¥ 414,075 ¥ 17,764 ¥ 232,250 ¥ 18,642 ¥ 709,394 ¥ (37,749 ) ¥ 671,645 Assets ¥ 5,250,120 ¥ 12,310,903 ¥ 553,219 ¥ 3,491,191 ¥ 505,794 ¥ 22,111,227 ¥ 138,552 ¥ 22,249,779 Non-current ¥ 3,006,685 ¥ 5,196,501 ¥ 55,887 ¥ 667,201 ¥ 133,948 ¥ 9,060,222 ¥ — ¥ 9,060,222 For the three months ended December 31, 2020 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 559,587 ¥ 2,068,582 ¥ 114,672 ¥ 892,829 ¥ 135,899 ¥ 3,771,569 ¥ — ¥ 3,771,569 Inter-geographic areas 518,693 99,268 58,881 136,149 1,887 814,878 (814,878 ) — Total 1,078,280 2,167,850 173,553 1,028,978 137,786 4,586,447 (814,878 ) 3,771,569 Operating profit (loss) ¥ 43,691 ¥ 149,920 ¥ 7,114 ¥ 79,132 ¥ (1,653 ) ¥ 278,204 ¥ (469 ) ¥ 277,735 For the three months ended December 31, 2021 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 607,190 ¥ 1,849,299 ¥ 122,244 ¥ 949,803 ¥ 160,249 ¥ 3,688,785 ¥ — ¥ 3,688,785 Inter-geographic areas 514,470 104,766 8,779 181,501 2,340 811,856 (811,856 ) — Total 1,121,660 1,954,065 131,023 1,131,304 162,589 4,500,641 (811,856 ) 3,688,785 Operating profit (loss) ¥ 11,614 ¥ 134,619 ¥ 4,897 ¥ 98,383 ¥ 1,575 ¥ 251,088 ¥ (21,639 ) ¥ 229,449 Explanatory notes: 1. Major countries in each geographic area: North America United States, Canada, Mexico Europe United Kingdom, Germany, Belgium, Italy, France Asia Thailand, China, India, Vietnam, Malaysia Other Regions Brazil, Australia 2. Operating profit (loss) of each geographical region is measured in a consistent manner with consolidated operating profit, which is profit before income taxes before share of profit of investments accounted for using the equity method and finance income and finance costs. 3. Assets of each geographical region are defined as total assets including investments accounted for using the equity method, derivatives, and deferred tax assets. 4. Sales revenues between geographic areas are generally made at values that approximate arm’s-length 5. Reconciling items include elimination of inter-geographic transactions and balances as well as unallocated corporate assets. Unallocated corporate assets, included in reconciling items as of December 31, 2020 and 2021 amounted to ¥931,069 million and ¥847,711 million, respectively, which consist primarily of the Company’s cash and cash equivalents and financial assets measured at fair value through other comprehensive income.

Reversal of Impairment Loss On

Reversal of Impairment Loss On Investments Accounted For Using The Equity Method	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Reversal of impairment loss on investments accounted for using the equity method	(5) Reversal of impairment loss on investments accounted for using the equity method For the nine months ended December 31, 2020, upon the successful completion of the tender offers targeting our former affiliates which were Keihin Corporation, Showa Corporation and Nissin Kogyo Co., Ltd. (collectively, the “Target Companies”), the Company recognized reversal of impairment losses of ¥56,849 million which had been previously recognized on the investments in certain Target Companies accounted for using the equity method, based on quoted market values which had increased since the announcement of the tender offers. The reversal of impairment losses is included in share of profit of investments accounted for using the equity method in the condensed consolidated interim statement of income. For the nine months ended December 31, 2021, the Company did not recognize any significant reversal of impairment losses.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Dec. 31, 2021
Equipment on operating leases [member]
Statement [LineItems]
Property, Plant and Equipment	(6) Equipment on Operating Leases The additions to equipment on operating leases for the nine months ended December 31, 2020 and 2021 are¥1,482,193 million and ¥1,636,938 million, respectively. The sales or disposals of equipment on operating leases for the nine months ended December 31, 2020 and 2021 are ¥764,146 million and ¥976,175 million, respectively.
Property, plant and equipment [member]
Statement [LineItems]
Property, Plant and Equipment	(7) Property, Plant and Equipment The additions to property, plant and equipment for the nine months ended December 31, 2020 and 2021 are ¥251,576 million and ¥242,976 million, respectively. The sales or disposals of property, plant and equipment for the nine months ended December 31, 2020 and 2021 are ¥29,340 million and ¥21,982 million, respectively.

Provisions

Provisions	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Provisions	(8) Provisions The components of and changes in provisions for the nine months ended December 31, 2021 are as follows: Yen (millions) Product Other Total Balance as of April 1, 2021 ¥ 481,023 ¥ 160,018 ¥ 641,041 Provision ¥ 85,742 ¥ 4,947 ¥ 90,689 Write-offs (135,208 ) (77,107 ) (212,315 ) Reversal (14,406 ) (1,600 ) (16,006 ) Exchange differences on translating foreign operations 8,786 3,054 11,840 Balance as of December 31, 2021 ¥ 425,937 ¥ 89,312 ¥ 515,249 Current liabilities and non-current Yen (millions) As of March 31, As of December 31, Current liabilities ¥ 362,151 ¥ 262,373 Non-current 278,890 252,876 Total ¥ 641,041 ¥ 515,249 Explanatory note: * Honda recognizes provisions for product warranties to cover future product warranty expenses. Honda recognizes costs for general warranties on products Honda sells and for specific warranty programs, including product recalls. Honda recognizes general estimated warranty costs at the time products are sold to customers. Honda also recognizes specific estimated warranty program costs when it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation, and a reliable estimate can be made of the amount of the obligation. These provisions are estimated based on historical warranty claim experience with consideration given to the expected level of future warranty costs as well as current information on repair costs. Provision for product warranties are utilized for expenditures based on the demand from customers and dealers.

Sales Revenue

Sales Revenue	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Sales Revenue	(9) Sales Revenue As stated in Note 4, Honda has four reportable segments: Motorcycle business, Automobile business, Financial services business and Life creation and other businesses. The sales revenue disaggregated by geographical markets based on the location of the customer and the reconciliation of the disaggregated revenue with the four reportable segments for the nine months ended December 31, 2020 and 2021 are as follows: For the nine months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 63,671 ¥ 936,043 ¥ 91,615 ¥ 41,826 ¥ 1,133,155 North America 143,742 3,408,131 778,483 98,425 4,428,781 Europe 93,641 213,196 — 39,724 346,561 Asia 802,575 1,472,728 1 34,844 2,310,148 Other Regions 152,863 167,147 — 12,079 332,089 Total ¥ 1,256,492 ¥ 6,197,245 ¥ 870,099 ¥ 226,898 ¥ 8,550,734 Revenue arising from the other sources* 1,681 10,483 983,542 273 995,979 Total ¥ 1,258,173 ¥ 6,207,728 ¥ 1,853,641 ¥ 227,171 ¥ 9,546,713 For the nine months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 78,716 ¥ 964,125 ¥ 100,930 ¥ 56,945 ¥ 1,200,716 North America 176,848 3,610,940 970,204 117,671 4,875,663 Europe 149,675 238,051 — 51,988 439,714 Asia 942,846 1,636,675 30 47,379 2,626,930 Other Regions 252,477 212,109 — 17,807 482,393 Total ¥ 1,600,562 ¥ 6,661,900 ¥ 1,071,164 ¥ 291,790 ¥ 9,625,416 Revenue arising from the other sources* 1,534 6,757 1,043,171 135 1,051,597 Total ¥ 1,602,096 ¥ 6,668,657 ¥ 2,114,335 ¥ 291,925 ¥ 10,677,013 Explanatory note: * Revenue arising from the other sources primarily includes lease revenues recognized under IFRS 16 and interest recognized under IFRS 9. For the three months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 19,699 ¥ 334,622 ¥ 30,291 ¥ 17,483 ¥ 402,095 North America 48,628 1,478,347 257,062 32,093 1,816,130 Europe 22,540 76,339 — 14,022 112,901 Asia 335,336 621,458 — 12,376 969,170 Other Regions 64,525 72,275 — 4,851 141,651 Total ¥ 490,728 ¥ 2,583,041 ¥ 287,353 ¥ 80,825 ¥ 3,441,947 Revenue arising from the other sources* 129 2,149 327,196 148 329,622 Total ¥ 490,857 ¥ 2,585,190 ¥ 614,549 ¥ 80,973 ¥ 3,771,569 For the three months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 24,897 ¥ 341,810 ¥ 35,397 ¥ 22,562 ¥ 424,666 North America 62,516 1,192,577 288,582 38,607 1,582,282 Europe 36,689 66,695 — 17,545 120,929 Asia 363,817 652,468 17 19,735 1,036,037 Other Regions 89,278 77,448 — 6,772 173,498 Total ¥ 577,197 ¥ 2,330,998 ¥ 323,996 ¥ 105,221 ¥ 3,337,412 Revenue arising from the other sources* 1,169 2,390 347,781 33 351,373 Total ¥ 578,366 ¥ 2,333,388 ¥ 671,777 ¥ 105,254 ¥ 3,688,785 Explanatory note: * Revenue arising from the other sources primarily includes lease revenues recognized under IFRS 16 and interest recognized under IFRS 9.

Fair Value

Fair Value	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Fair Value	(10) Fair Value (a) Definition of Fair Value Hierarchy Honda uses a three-level hierarchy when measuring fair value. The following is a description of the three hierarchy levels: Level 1 Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access as of the measurement date Level 2 Inputs other than quoted prices included within Level 1 that are observable for the assets or liabilities, either directly or indirectly Level 3 Unobservable inputs for the assets or liabilities The level in the fair value hierarchy within which a fair value measurement in its entirety falls is based on the lowest input that is significant to the fair value measurement in its entirety. Honda recognizes the transfers between the levels of the fair value hierarchy at the end of the reporting period during which the change has occurred. (b) Method of Fair Value Measurement The fair values of assets and liabilities are determined based on relevant market information and through the use of an appropriate valuation method. The measurement methods and assumptions used in the measurement of assets and liabilities are as follows: (Cash and cash equivalents, trade receivables and trade payables) The fair values approximate their carrying amounts due to their short-term maturities. (Receivables from financial services) The fair value of receivables from financial services is measured primarily by discounting future cash flows using the current interest rates applicable for these receivables of similar remaining maturities. Fair value measurement for receivables from financial services is classified as Level 3. (Debt securities) Debt securities consist mainly of mutual funds, corporate bonds, local bonds and auction rate securities. The fair value of mutual funds with an active market is measured by using quoted market prices. Fair value measurement for mutual funds with an active market is classified as Level 1. The fair values of corporate bonds and local bonds are measured based on proprietary pricing models provided by specialists and/or market makers and the models obtain a wide array of market observable inputs such as credit ratings and discount rates. Fair value measurements for corporate bonds and local bonds are classified as Level 2. The subsidiary’s auction rate securities are A to AAA rated and are insured by qualified guarantee agencies, and reinsured by the Secretary of Education and the United States government, and guaranteed at approximately 95% by the United States government. To measure fair value of auction rate securities, Honda uses a third-party-developed valuation model which obtains a wide array of market observable inputs, as well as unobservable inputs including probability of passing or failing auction at each auction. Fair value measurement for auction rate securities is classified as Level 3. (Equity securities) The fair value of equity securities with an active market is measured by using quoted market prices. Fair value measurement for equity securities with an active market is classified as Level 1. The fair value of equity securities with no active market is measured mainly by using the comparable company valuation method and other appropriate valuation methods. Fair value measurement for equity securities with no active market is classified as Level 3. In addition, in the case that cost represents the best estimate of fair value, fair value for the equity securities with no active market is measured at cost. Price book-value ratio (PBR) of a comparable company are used as a significant unobservable input in the fair value measurement of equity securities classified as Level 3. The fair value increases (decreases) as PBR of a comparable company rise (decline). Such fair value measurements are conducted in accordance with the group accounting policy approved by the appropriate person of authority and based upon valuation methods determined by personnel in accounting divisions of Honda. (Derivatives) Derivatives consist mainly of foreign currency forward exchange contracts, foreign currency option contracts, currency swap agreements and interest rate swap agreements. The fair values of foreign currency forward exchange contracts and foreign currency option contracts are measured by using market observable inputs such as spot exchange rates, discount rates and implied volatility. The fair values of currency swap agreements and interest rate swap agreements are measured by discounting future cash flows using market observable inputs such as LIBOR rates, swap rates, and foreign exchange rates. Fair value measurements for these derivatives are classified as Level 2. The credit risk of the counterparties is considered in the valuation of derivatives. (Financing liabilities) The fair value of financing liabilities is measured by discounting future cash flows using interest rates currently available for liabilities of similar terms and remaining maturities. Fair value measurement of financing liabilities is mainly classified as Level 2. (c) Assets and Liabilities Measured at Fair Value on a recurring basis Assets and liabilities measured at fair value on a recurring basis as of March 31, 2021 and December 31, 2021 consist of the following: Yen (millions) As of March 31, 2021 Level 1 Level 2 Level 3 Total Other financial assets: Financial assets measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 43,782 ¥ — ¥ 43,782 Interest rate instruments — 60,367 — 60,367 Other — — 4,829 4,829 Total — 104,149 4,829 108,978 Debt securities 26,570 36,439 5,314 68,323 Financial assets measured at fair value through other comprehensive income: Debt securities — 10,134 — 10,134 Equity securities 234,155 — 110,050 344,205 Total ¥ 260,725 ¥ 150,722 ¥ 120,193 ¥ 531,640 Other financial liabilities: Financial liabilities measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 17,343 ¥ — ¥ 17,343 Interest rate instruments — 64,913 — 64,913 Total — 82,256 — 82,256 Total ¥ — ¥ 82,256 ¥ — ¥ 82,256 There were no transfers between Level 1 and Level 2 for the year ended March 31, 2021. Yen (millions) As of December 31, 2021 Level 1 Level 2 Level 3 Total Other financial assets: Financial assets measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 27,718 ¥ — ¥ 27,718 Interest rate instruments — 59,913 — 59,913 Other — — 4,607 4,607 Total — 87,631 4,607 92,238 Debt securities 41,997 54,842 4,372 101,211 Financial assets measured at fair value through other comprehensive income: Debt securities — 17,627 — 17,627 Equity securities 352,746 — 119,017 471,763 Total ¥ 394,743 ¥ 160,100 ¥ 127,996 ¥ 682,839 Other financial liabilities: Financial liabilities measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 28,128 ¥ — ¥ 28,128 Interest rate instruments — 35,695 — 35,695 Total — 63,823 — 63,823 Total ¥ — ¥ 63,823 ¥ — ¥ 63,823 There were no transfers between Level 1 and Level 2 for the nine months ended December 31, 2021. There were no significant effects of the measurements on profit or loss or other comprehensive income in Level 3 assets and liabilities measured at fair value on a recurring basis for the nine months ended December 31, 2021. (d) Financial Assets and Financial Liabilities measured at amortized cost The carrying amounts and fair values of financial assets and financial liabilities measured at amortized cost as of March 31, 2021 and December 31, 2021 are as follows: Yen (millions) As of March 31, As of December 31, Carrying Fair value Carrying Fair value Receivables from financial services ¥ 5,414,550 ¥ 5,488,065 ¥ 5,287,441 ¥ 5,338,370 Debt securities 173,302 173,302 214,237 214,237 Financing liabilities 7,720,985 7,809,379 7,589,741 7,631,960 The table does not include financial assets and financial liabilities measured at amortized cost whose fair values approximate their carrying amounts.

Contingent Liabilities

Contingent Liabilities	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Contingent Liabilities	(11) Contingent Liabilities Claims and Lawsuits Honda is subject to potential liability under various lawsuits and claims. Honda recognizes a provision for loss contingencies when it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation, and a reliable estimate can be made of the amount of the obligation. Honda reviews these pending lawsuits and claims periodically and adjusts the amounts recognized for these contingent liabilities, if necessary, by considering the nature of lawsuits and claims, the progress of the case and the opinions of legal counsel. With respect to product liability, personal injury claims or lawsuits, Honda believes that any judgment that may be recovered by any plaintiff for general and special damages and court costs will be adequately covered by Honda’s insurance and provision. Punitive damages are claimed in certain of these lawsuits. After consultation with legal counsel, and taking into account all known factors pertaining to existing lawsuits and claims, Honda believes that the ultimate outcome of such lawsuits and pending claims should not result in liability to Honda that would be likely to have an adverse material effect on its consolidated financial position or results of operations. Loss related to airbag inflators Honda has been conducting market-based measures in relation to airbag inflators. Honda recognizes a provision for specific warranty costs when it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation, and a reliable estimate can be made of the amount of the obligation. There is a possibility that Honda will need to recognize additional provisions when new evidence related to the product recalls arise, however, it is not possible for Honda to reasonably estimate the amount and timing of potential future losses as of the date of this report.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Earnings Per Share	(12) Earnings Per Share Earnings per share attributable to owners of the parent for the nine months ended December 31, 2020 and 2021 are calculated based on the following information. There were no significant dilutive potential common shares outstanding for the nine months ended December 31, 2020 and 2021. 2020 2021 Profit for the period attributable to owners of the parent (millions of yen) ¥ 444,102 ¥ 582,169 Weighted average number of common shares outstanding, basic (shares) 1,726,634,998 1,722,778,664 Basic earnings per share attributable to owners of the parent (yen) ¥ 257.21 ¥ 337.92 Earnings per share attributable to owners of the parent for the three months ended December 31, 2020 and 2021 are calculated based on the following information. There were no significant dilutive potential common shares outstanding for the three months ended December 31, 2020 and 2021. 2020 2021 Profit for the period attributable to owners of the parent (millions of yen) ¥ 284,051 ¥ 192,960 Weighted average number of common shares outstanding, basic (shares) 1,726,645,596 1,716,433,911 Basic earnings per share attributable to owners of the parent (yen) ¥ 164.51 ¥ 112.42

Dividend

Dividend	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Dividend	(13) Dividend Dividend payout For the nine months ended December 31, 2020 Resolution The Board of Directors Meeting on May 12, 2020 Type of shares Common shares Total amount of dividends (millions of yen) 48,363 Dividend per share (yen) 28.00 Record date March 31, 2020 Effective date June 3, 2020 Resolution The Board of Directors Meeting on August 5, 2020 Type of shares Common shares Total amount of dividends (millions of yen) 18,999 Dividend per share (yen) 11.00 Record date June 30, 2020 Effective date September 4, 2020 Resolution The Board of Directors Meeting on November 6, 2020 Type of shares Common shares Total amount of dividends (millions of yen) 32,818 Dividend per share (yen) 19.00 Record date September 30, 2020 Effective date December 2, 2020 For the nine months ended December 31, 2021 Resolution The Board of Directors Meeting on May 14, 2021 Type of shares Common shares Total amount of dividends (millions of yen) 93,272 Dividend per share (yen) 54.00 Record date March 31, 2021 Effective date June 7, 2021 Resolution The Board of Directors Meeting on November 5, 2021 Type of shares Common shares Total amount of dividends (millions of yen) 95,130 Dividend per share (yen) 55.00 Record date September 30, 2021 Effective date December 1, 2021

Approval of Release of Condense

Approval of Release of Condensed Consolidated Interim Financial Statements	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Approval of Release of Condensed Consolidated Interim Financial Statements	(14) Approval of Release of Condensed Consolidated Interim Financial Statements The release of the condensed consolidated interim financial statements was approved by Toshihiro Mibe, Director, President and Representative Executive Officer and Kohei Takeuchi, Director, Senior Managing Executive Officer and Chief Financial Officer on February 10, 2022.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Summary of Segment Information	Segment information as of and for the nine months ended December 31, 2020 and 2021 is as follows: As of and for the nine months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 1,258,173 ¥ 6,207,728 ¥ 1,853,641 ¥ 227,171 ¥ 9,546,713 ¥ — ¥ 9,546,713 Intersegment — 153,209 9,520 14,270 176,999 (176,999 ) — Total 1,258,173 6,360,937 1,863,161 241,441 9,723,712 (176,999 ) 9,546,713 Segment profit (loss) ¥ 152,379 ¥ 52,624 ¥ 250,581 ¥ (8,584 ) ¥ 447,000 ¥ — ¥ 447,000 Segment assets ¥ 1,382,083 ¥ 8,061,407 ¥ 10,280,529 ¥ 360,515 ¥ 20,084,534 ¥ 695,669 ¥ 20,780,203 Depreciation and amortization 50,324 378,524 617,238 11,484 1,057,570 — 1,057,570 Capital expenditures 28,358 348,446 1,485,375 7,004 1,869,183 — 1,869,183 As of and for the nine months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 1,602,096 ¥ 6,668,657 ¥ 2,114,335 ¥ 291,925 ¥ 10,677,013 ¥ — ¥ 10,677,013 Intersegment — 155,020 2,124 17,041 174,185 (174,185 ) — Total 1,602,096 6,823,677 2,116,459 308,966 10,851,198 (174,185 ) 10,677,013 Segment profit (loss) ¥ 232,395 ¥ 188,547 ¥ 258,149 ¥ (7,446 ) ¥ 671,645 ¥ — ¥ 671,645 Segment assets ¥ 1,465,871 ¥ 8,795,380 ¥ 10,914,940 ¥ 385,776 ¥ 21,561,967 ¥ 687,812 ¥ 22,249,779 Depreciation and amortization 49,127 381,128 661,252 12,728 1,104,235 — 1,104,235 Capital expenditures 30,189 287,082 1,639,003 10,501 1,966,775 — 1,966,775 Segment information for the three months ended December 31, 2020 and 2021 is as follows: For the three months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 490,857 ¥ 2,585,190 ¥ 614,549 ¥ 80,973 ¥ 3,771,569 ¥ — ¥ 3,771,569 Intersegment — 52,925 3,097 5,434 61,456 (61,456 ) — Total 490,857 2,638,115 617,646 86,407 3,833,025 (61,456 ) 3,771,569 Segment profit (loss) ¥ 72,715 ¥ 123,127 ¥ 85,715 ¥ (3,822 ) ¥ 277,735 ¥ — ¥ 277,735 For the three months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Segment Reconciling Consolidated Sales revenue: External customers ¥ 578,366 ¥ 2,333,388 ¥ 671,777 ¥ 105,254 ¥ 3,688,785 ¥ — ¥ 3,688,785 Intersegment — 55,365 834 6,008 62,207 (62,207 ) — Total 578,366 2,388,753 672,611 111,262 3,750,992 (62,207 ) 3,688,785 Segment profit (loss) ¥ 84,258 ¥ 71,443 ¥ 81,335 ¥ (7,587 ) ¥ 229,449 ¥ — ¥ 229,449 Explanatory notes: 1. Segment profit (loss) of each segment is measured in a consistent manner with consolidated operating profit, which is profit before income taxes before share of profit of investments accounted for using the equity method and finance income and finance costs. Expenses not directly associated with specific segments are allocated based on the most reasonable measures applicable. 2. Segment assets of each segment are defined as total assets including investments accounted for using the equity method, derivatives, and deferred tax assets. Segment assets are based on those directly associated with each segment and those not directly associated with specific segments are allocated based on the most reasonable measures applicable except for the corporate assets described below. 3. Intersegment sales revenues are generally made at values that approximate arm’s-length 4. Reconciling items include elimination of intersegment transactions and balances as well as unallocated corporate assets. Unallocated corporate assets, included in reconciling items as of December 31, 2020 and 2021 amounted to ¥931,069 million and ¥847,711 million, respectively, which consist primarily of the Company’s cash and cash equivalents and financial assets measured at fair value through other comprehensive income.
Supplemental Geographical Information Based on Location	Supplemental geographical information based on the location of the Company and its subsidiaries As of and for the nine months ended December 31, 2020 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 1,559,844 ¥ 5,200,322 ¥ 350,963 ¥ 2,124,773 ¥ 310,811 ¥ 9,546,713 ¥ — ¥ 9,546,713 Inter-geographic areas 1,189,865 270,594 121,711 329,638 4,509 1,916,317 (1,916,317 ) — Total 2,749,709 5,470,916 472,674 2,454,411 315,320 11,463,030 (1,916,317 ) 9,546,713 Operating profit (loss) ¥ (31,386 ) ¥ 269,236 ¥ 18,352 ¥ 170,069 ¥ 421 ¥ 426,692 ¥ 20,308 ¥ 447,000 Assets ¥ 5,048,475 ¥ 11,271,264 ¥ 666,494 ¥ 2,996,726 ¥ 484,914 ¥ 20,467,873 ¥ 312,330 ¥ 20,780,203 Non-current ¥ 3,038,243 ¥ 4,637,887 ¥ 58,660 ¥ 643,185 ¥ 114,368 ¥ 8,492,343 ¥ — ¥ 8,492,343 As of and for the nine months ended December 31, 2021 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 1,713,992 ¥ 5,681,155 ¥ 440,255 ¥ 2,400,719 ¥ 440,892 ¥ 10,677,013 ¥ — ¥ 10,677,013 Inter-geographic areas 1,506,703 341,172 89,067 491,398 7,479 2,435,819 (2,435,819 ) — Total 3,220,695 6,022,327 529,322 2,892,117 448,371 13,112,832 (2,435,819 ) 10,677,013 Operating profit (loss) ¥ 26,663 ¥ 414,075 ¥ 17,764 ¥ 232,250 ¥ 18,642 ¥ 709,394 ¥ (37,749 ) ¥ 671,645 Assets ¥ 5,250,120 ¥ 12,310,903 ¥ 553,219 ¥ 3,491,191 ¥ 505,794 ¥ 22,111,227 ¥ 138,552 ¥ 22,249,779 Non-current ¥ 3,006,685 ¥ 5,196,501 ¥ 55,887 ¥ 667,201 ¥ 133,948 ¥ 9,060,222 ¥ — ¥ 9,060,222 For the three months ended December 31, 2020 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 559,587 ¥ 2,068,582 ¥ 114,672 ¥ 892,829 ¥ 135,899 ¥ 3,771,569 ¥ — ¥ 3,771,569 Inter-geographic areas 518,693 99,268 58,881 136,149 1,887 814,878 (814,878 ) — Total 1,078,280 2,167,850 173,553 1,028,978 137,786 4,586,447 (814,878 ) 3,771,569 Operating profit (loss) ¥ 43,691 ¥ 149,920 ¥ 7,114 ¥ 79,132 ¥ (1,653 ) ¥ 278,204 ¥ (469 ) ¥ 277,735 For the three months ended December 31, 2021 Yen (millions) Japan North Europe Asia Other Total Reconciling Consolidated Sales revenue: External customers ¥ 607,190 ¥ 1,849,299 ¥ 122,244 ¥ 949,803 ¥ 160,249 ¥ 3,688,785 ¥ — ¥ 3,688,785 Inter-geographic areas 514,470 104,766 8,779 181,501 2,340 811,856 (811,856 ) — Total 1,121,660 1,954,065 131,023 1,131,304 162,589 4,500,641 (811,856 ) 3,688,785 Operating profit (loss) ¥ 11,614 ¥ 134,619 ¥ 4,897 ¥ 98,383 ¥ 1,575 ¥ 251,088 ¥ (21,639 ) ¥ 229,449 Explanatory notes: 1. Major countries in each geographic area: North America United States, Canada, Mexico Europe United Kingdom, Germany, Belgium, Italy, France Asia Thailand, China, India, Vietnam, Malaysia Other Regions Brazil, Australia 2. Operating profit (loss) of each geographical region is measured in a consistent manner with consolidated operating profit, which is profit before income taxes before share of profit of investments accounted for using the equity method and finance income and finance costs. 3. Assets of each geographical region are defined as total assets including investments accounted for using the equity method, derivatives, and deferred tax assets. 4. Sales revenues between geographic areas are generally made at values that approximate arm’s-length 5. Reconciling items include elimination of inter-geographic transactions and balances as well as unallocated corporate assets. Unallocated corporate assets, included in reconciling items as of December 31, 2020 and 2021 amounted to ¥931,069 million and ¥847,711 million, respectively, which consist primarily of the Company’s cash and cash equivalents and financial assets measured at fair value through other comprehensive income.

Provisions (Tables)

Provisions (Tables)	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Components of and Changes in Provisions	The components of and changes in provisions for the nine months ended December 31, 2021 are as follows: Yen (millions) Product Other Total Balance as of April 1, 2021 ¥ 481,023 ¥ 160,018 ¥ 641,041 Provision ¥ 85,742 ¥ 4,947 ¥ 90,689 Write-offs (135,208 ) (77,107 ) (212,315 ) Reversal (14,406 ) (1,600 ) (16,006 ) Exchange differences on translating foreign operations 8,786 3,054 11,840 Balance as of December 31, 2021 ¥ 425,937 ¥ 89,312 ¥ 515,249
Current Liabilities and Non-current Liabilities of Provisions	Current liabilities and non-current Yen (millions) As of March 31, As of December 31, Current liabilities ¥ 362,151 ¥ 262,373 Non-current 278,890 252,876 Total ¥ 641,041 ¥ 515,249

Sales Revenue (Tables)

Sales Revenue (Tables)	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Summary of Reconciliation of the Disaggregated Revenue with the Four Reportable Segments	The sales revenue disaggregated by geographical markets based on the location of the customer and the reconciliation of the disaggregated revenue with the four reportable segments for the nine months ended December 31, 2020 and 2021 are as follows: For the nine months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 63,671 ¥ 936,043 ¥ 91,615 ¥ 41,826 ¥ 1,133,155 North America 143,742 3,408,131 778,483 98,425 4,428,781 Europe 93,641 213,196 — 39,724 346,561 Asia 802,575 1,472,728 1 34,844 2,310,148 Other Regions 152,863 167,147 — 12,079 332,089 Total ¥ 1,256,492 ¥ 6,197,245 ¥ 870,099 ¥ 226,898 ¥ 8,550,734 Revenue arising from the other sources* 1,681 10,483 983,542 273 995,979 Total ¥ 1,258,173 ¥ 6,207,728 ¥ 1,853,641 ¥ 227,171 ¥ 9,546,713 For the nine months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 78,716 ¥ 964,125 ¥ 100,930 ¥ 56,945 ¥ 1,200,716 North America 176,848 3,610,940 970,204 117,671 4,875,663 Europe 149,675 238,051 — 51,988 439,714 Asia 942,846 1,636,675 30 47,379 2,626,930 Other Regions 252,477 212,109 — 17,807 482,393 Total ¥ 1,600,562 ¥ 6,661,900 ¥ 1,071,164 ¥ 291,790 ¥ 9,625,416 Revenue arising from the other sources* 1,534 6,757 1,043,171 135 1,051,597 Total ¥ 1,602,096 ¥ 6,668,657 ¥ 2,114,335 ¥ 291,925 ¥ 10,677,013 Explanatory note: * Revenue arising from the other sources primarily includes lease revenues recognized under IFRS 16 and interest recognized under IFRS 9. For the three months ended December 31, 2020 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 19,699 ¥ 334,622 ¥ 30,291 ¥ 17,483 ¥ 402,095 North America 48,628 1,478,347 257,062 32,093 1,816,130 Europe 22,540 76,339 — 14,022 112,901 Asia 335,336 621,458 — 12,376 969,170 Other Regions 64,525 72,275 — 4,851 141,651 Total ¥ 490,728 ¥ 2,583,041 ¥ 287,353 ¥ 80,825 ¥ 3,441,947 Revenue arising from the other sources* 129 2,149 327,196 148 329,622 Total ¥ 490,857 ¥ 2,585,190 ¥ 614,549 ¥ 80,973 ¥ 3,771,569 For the three months ended December 31, 2021 Yen (millions) Motorcycle Automobile Financial Life Creation Total Revenue arising from Contracts with Customers Japan ¥ 24,897 ¥ 341,810 ¥ 35,397 ¥ 22,562 ¥ 424,666 North America 62,516 1,192,577 288,582 38,607 1,582,282 Europe 36,689 66,695 — 17,545 120,929 Asia 363,817 652,468 17 19,735 1,036,037 Other Regions 89,278 77,448 — 6,772 173,498 Total ¥ 577,197 ¥ 2,330,998 ¥ 323,996 ¥ 105,221 ¥ 3,337,412 Revenue arising from the other sources* 1,169 2,390 347,781 33 351,373 Total ¥ 578,366 ¥ 2,333,388 ¥ 671,777 ¥ 105,254 ¥ 3,688,785 Explanatory note: * Revenue arising from the other sources primarily includes lease revenues recognized under IFRS 16 and interest recognized under IFRS 9.

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Dec. 31, 2021
Measured at fair value on a recurring basis [member]
Statement [LineItems]
Financial Assets and Financial Liabilities	Assets and liabilities measured at fair value on a recurring basis as of March 31, 2021 and December 31, 2021 consist of the following: Yen (millions) As of March 31, 2021 Level 1 Level 2 Level 3 Total Other financial assets: Financial assets measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 43,782 ¥ — ¥ 43,782 Interest rate instruments — 60,367 — 60,367 Other — — 4,829 4,829 Total — 104,149 4,829 108,978 Debt securities 26,570 36,439 5,314 68,323 Financial assets measured at fair value through other comprehensive income: Debt securities — 10,134 — 10,134 Equity securities 234,155 — 110,050 344,205 Total ¥ 260,725 ¥ 150,722 ¥ 120,193 ¥ 531,640 Other financial liabilities: Financial liabilities measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 17,343 ¥ — ¥ 17,343 Interest rate instruments — 64,913 — 64,913 Total — 82,256 — 82,256 Total ¥ — ¥ 82,256 ¥ — ¥ 82,256 There were no transfers between Level 1 and Level 2 for the year ended March 31, 2021. Yen (millions) As of December 31, 2021 Level 1 Level 2 Level 3 Total Other financial assets: Financial assets measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 27,718 ¥ — ¥ 27,718 Interest rate instruments — 59,913 — 59,913 Other — — 4,607 4,607 Total — 87,631 4,607 92,238 Debt securities 41,997 54,842 4,372 101,211 Financial assets measured at fair value through other comprehensive income: Debt securities — 17,627 — 17,627 Equity securities 352,746 — 119,017 471,763 Total ¥ 394,743 ¥ 160,100 ¥ 127,996 ¥ 682,839 Other financial liabilities: Financial liabilities measured at fair value through profit or loss: Derivatives Foreign exchange instruments ¥ — ¥ 28,128 ¥ — ¥ 28,128 Interest rate instruments — 35,695 — 35,695 Total — 63,823 — 63,823 Total ¥ — ¥ 63,823 ¥ — ¥ 63,823
At cost [member]
Statement [LineItems]
Financial Assets and Financial Liabilities	The carrying amounts and fair values of financial assets and financial liabilities measured at amortized cost as of March 31, 2021 and December 31, 2021 are as follows: Yen (millions) As of March 31, As of December 31, Carrying Fair value Carrying Fair value Receivables from financial services ¥ 5,414,550 ¥ 5,488,065 ¥ 5,287,441 ¥ 5,338,370 Debt securities 173,302 173,302 214,237 214,237 Financing liabilities 7,720,985 7,809,379 7,589,741 7,631,960

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Summary of Earnings Per Share	Earnings per share attributable to owners of the parent for the nine months ended December 31, 2020 and 2021 are calculated based on the following information. There were no significant dilutive potential common shares outstanding for the nine months ended December 31, 2020 and 2021. 2020 2021 Profit for the period attributable to owners of the parent (millions of yen) ¥ 444,102 ¥ 582,169 Weighted average number of common shares outstanding, basic (shares) 1,726,634,998 1,722,778,664 Basic earnings per share attributable to owners of the parent (yen) ¥ 257.21 ¥ 337.92 Earnings per share attributable to owners of the parent for the three months ended December 31, 2020 and 2021 are calculated based on the following information. There were no significant dilutive potential common shares outstanding for the three months ended December 31, 2020 and 2021. 2020 2021 Profit for the period attributable to owners of the parent (millions of yen) ¥ 284,051 ¥ 192,960 Weighted average number of common shares outstanding, basic (shares) 1,726,645,596 1,716,433,911 Basic earnings per share attributable to owners of the parent (yen) ¥ 164.51 ¥ 112.42

Dividend (Tables)

Dividend (Tables)	9 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Summary of Dividends from Retained Earnings	Dividend payout For the nine months ended December 31, 2020 Resolution The Board of Directors Meeting on May 12, 2020 Type of shares Common shares Total amount of dividends (millions of yen) 48,363 Dividend per share (yen) 28.00 Record date March 31, 2020 Effective date June 3, 2020 Resolution The Board of Directors Meeting on August 5, 2020 Type of shares Common shares Total amount of dividends (millions of yen) 18,999 Dividend per share (yen) 11.00 Record date June 30, 2020 Effective date September 4, 2020 Resolution The Board of Directors Meeting on November 6, 2020 Type of shares Common shares Total amount of dividends (millions of yen) 32,818 Dividend per share (yen) 19.00 Record date September 30, 2020 Effective date December 2, 2020 For the nine months ended December 31, 2021 Resolution The Board of Directors Meeting on May 14, 2021 Type of shares Common shares Total amount of dividends (millions of yen) 93,272 Dividend per share (yen) 54.00 Record date March 31, 2021 Effective date June 7, 2021 Resolution The Board of Directors Meeting on November 5, 2021 Type of shares Common shares Total amount of dividends (millions of yen) 95,130 Dividend per share (yen) 55.00 Record date September 30, 2021 Effective date December 1, 2021

Segment Information - Additiona

Segment Information - Additional Information (Detail) - Segments	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of operating segments [line items]
Number of reportable segments	4	4

Segment Information - Summary o

Segment Information - Summary of Segment Information (Detail) - JPY (¥) ¥ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Disclosure of operating segments [line items]
Sales revenue	¥ 3,688,785	¥ 3,771,569	¥ 10,677,013	¥ 9,546,713
Segment profit (loss)	229,449	277,735	671,645	447,000
Segment assets	22,249,779	20,780,203	22,249,779	20,780,203	¥ 21,921,030
Depreciation and amortization			1,104,235	1,057,570
Capital expenditures			1,966,775	1,869,183
External customers [member]
Disclosure of operating segments [line items]
Sales revenue	3,688,785	3,771,569	10,677,013	9,546,713
Intersegment [member]
Disclosure of operating segments [line items]
Sales revenue
Operating segments [member]
Disclosure of operating segments [line items]
Sales revenue	3,750,992	3,833,025	10,851,198	9,723,712
Segment profit (loss)	229,449	277,735	671,645	447,000
Segment assets	21,561,967	20,084,534	21,561,967	20,084,534
Depreciation and amortization			1,104,235	1,057,570
Capital expenditures			1,966,775	1,869,183
Operating segments [member] | External customers [member]
Disclosure of operating segments [line items]
Sales revenue	3,688,785	3,771,569	10,677,013	9,546,713
Operating segments [member] | Intersegment [member]
Disclosure of operating segments [line items]
Sales revenue	62,207	61,456	174,185	176,999
Operating segments [member] | Motorcycle business [member]
Disclosure of operating segments [line items]
Sales revenue	578,366	490,857	1,602,096	1,258,173
Segment profit (loss)	84,258	72,715	232,395	152,379
Segment assets	1,465,871	1,382,083	1,465,871	1,382,083
Depreciation and amortization			49,127	50,324
Capital expenditures			30,189	28,358
Operating segments [member] | Motorcycle business [member] | External customers [member]
Disclosure of operating segments [line items]
Sales revenue	578,366	490,857	1,602,096	1,258,173
Operating segments [member] | Motorcycle business [member] | Intersegment [member]
Disclosure of operating segments [line items]
Sales revenue
Operating segments [member] | Automobile business [member]
Disclosure of operating segments [line items]
Sales revenue	2,388,753	2,638,115	6,823,677	6,360,937
Segment profit (loss)	71,443	123,127	188,547	52,624
Segment assets	8,795,380	8,061,407	8,795,380	8,061,407
Depreciation and amortization			381,128	378,524
Capital expenditures			287,082	348,446
Operating segments [member] | Automobile business [member] | External customers [member]
Disclosure of operating segments [line items]
Sales revenue	2,333,388	2,585,190	6,668,657	6,207,728
Operating segments [member] | Automobile business [member] | Intersegment [member]
Disclosure of operating segments [line items]
Sales revenue	55,365	52,925	155,020	153,209
Operating segments [member] | Financial services business [member]
Disclosure of operating segments [line items]
Sales revenue	672,611	617,646	2,116,459	1,863,161
Segment profit (loss)	81,335	85,715	258,149	250,581
Segment assets	10,914,940	10,280,529	10,914,940	10,280,529
Depreciation and amortization			661,252	617,238
Capital expenditures			1,639,003	1,485,375
Operating segments [member] | Financial services business [member] | External customers [member]
Disclosure of operating segments [line items]
Sales revenue	671,777	614,549	2,114,335	1,853,641
Operating segments [member] | Financial services business [member] | Intersegment [member]
Disclosure of operating segments [line items]
Sales revenue	834	3,097	2,124	9,520
Operating segments [member] | Life creation and other businesses [member]
Disclosure of operating segments [line items]
Sales revenue	111,262	86,407	308,966	241,441
Segment profit (loss)	(7,587)	(3,822)	(7,446)	(8,584)
Segment assets	385,776	360,515	385,776	360,515
Depreciation and amortization			12,728	11,484
Capital expenditures			10,501	7,004
Operating segments [member] | Life creation and other businesses [member] | External customers [member]
Disclosure of operating segments [line items]
Sales revenue	105,254	80,973	291,925	227,171
Operating segments [member] | Life creation and other businesses [member] | Intersegment [member]
Disclosure of operating segments [line items]
Sales revenue	6,008	5,434	17,041	14,270
Reconciling items [member]
Disclosure of operating segments [line items]
Sales revenue	(62,207)	(61,456)	(174,185)	(176,999)
Segment profit (loss)
Segment assets	687,812	695,669	687,812	695,669
Depreciation and amortization
Capital expenditures
Reconciling items [member] | External customers [member]
Disclosure of operating segments [line items]
Sales revenue
Reconciling items [member] | Intersegment [member]
Disclosure of operating segments [line items]
Sales revenue	¥ (62,207)	¥ (61,456)	¥ (174,185)	¥ (176,999)

Segment Information - Summary_2

Segment Information - Summary of Segment Information (Parenthetical) (Detail) - JPY (¥) ¥ in Millions	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Disclosure of operating segments [line items]
Segment assets	¥ 22,249,779	¥ 21,921,030	¥ 20,780,203
Unallocated corporate assets [member]
Disclosure of operating segments [line items]
Segment assets	¥ 847,711		¥ 931,069

Segment Information - Supplemen

Segment Information - Supplemental Geographical Information Based on Location (Detail) - JPY (¥) ¥ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Disclosure of geographical areas [line items]
Sales revenue	¥ 3,688,785	¥ 3,771,569	¥ 10,677,013	¥ 9,546,713
Operating profit (loss)	229,449	277,735	671,645	447,000
Assets	22,249,779	20,780,203	22,249,779	20,780,203	¥ 21,921,030
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets	9,060,222	8,492,343	9,060,222	8,492,343
External customers [member]
Disclosure of geographical areas [line items]
Sales revenue	3,688,785	3,771,569	10,677,013	9,546,713
Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue
Material reconciling items [member]
Disclosure of geographical areas [line items]
Sales revenue	(62,207)	(61,456)	(174,185)	(176,999)
Operating profit (loss)
Assets	687,812	695,669	687,812	695,669
Material reconciling items [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue
Geographical consolidation [member]
Disclosure of geographical areas [line items]
Sales revenue	4,500,641	4,586,447	13,112,832	11,463,030
Operating profit (loss)	251,088	278,204	709,394	426,692
Assets	22,111,227	20,467,873	22,111,227	20,467,873
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets	9,060,222	8,492,343	9,060,222	8,492,343
Geographical consolidation [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue	3,688,785	3,771,569	10,677,013	9,546,713
Geographical consolidation [member] | Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue	811,856	814,878	2,435,819	1,916,317
Geographical consolidation [member] | Japan [member]
Disclosure of geographical areas [line items]
Sales revenue	1,121,660	1,078,280	3,220,695	2,749,709
Operating profit (loss)	11,614	43,691	26,663	(31,386)
Assets	5,250,120	5,048,475	5,250,120	5,048,475
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets	3,006,685	3,038,243	3,006,685	3,038,243
Geographical consolidation [member] | Japan [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue	607,190	559,587	1,713,992	1,559,844
Geographical consolidation [member] | Japan [member] | Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue	514,470	518,693	1,506,703	1,189,865
Geographical consolidation [member] | North America [member]
Disclosure of geographical areas [line items]
Sales revenue	1,954,065	2,167,850	6,022,327	5,470,916
Operating profit (loss)	134,619	149,920	414,075	269,236
Assets	12,310,903	11,271,264	12,310,903	11,271,264
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets	5,196,501	4,637,887	5,196,501	4,637,887
Geographical consolidation [member] | North America [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue	1,849,299	2,068,582	5,681,155	5,200,322
Geographical consolidation [member] | North America [member] | Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue	104,766	99,268	341,172	270,594
Geographical consolidation [member] | Europe [member]
Disclosure of geographical areas [line items]
Sales revenue	131,023	173,553	529,322	472,674
Operating profit (loss)	4,897	7,114	17,764	18,352
Assets	553,219	666,494	553,219	666,494
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets	55,887	58,660	55,887	58,660
Geographical consolidation [member] | Europe [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue	122,244	114,672	440,255	350,963
Geographical consolidation [member] | Europe [member] | Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue	8,779	58,881	89,067	121,711
Geographical consolidation [member] | Asia [member]
Disclosure of geographical areas [line items]
Sales revenue	1,131,304	1,028,978	2,892,117	2,454,411
Operating profit (loss)	98,383	79,132	232,250	170,069
Assets	3,491,191	2,996,726	3,491,191	2,996,726
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets	667,201	643,185	667,201	643,185
Geographical consolidation [member] | Asia [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue	949,803	892,829	2,400,719	2,124,773
Geographical consolidation [member] | Asia [member] | Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue	181,501	136,149	491,398	329,638
Geographical consolidation [member] | Other regions [member]
Disclosure of geographical areas [line items]
Sales revenue	162,589	137,786	448,371	315,320
Operating profit (loss)	1,575	(1,653)	18,642	421
Assets	505,794	484,914	505,794	484,914
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets	133,948	114,368	133,948	114,368
Geographical consolidation [member] | Other regions [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue	160,249	135,899	440,892	310,811
Geographical consolidation [member] | Other regions [member] | Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue	2,340	1,887	7,479	4,509
Reconciling items [member]
Disclosure of geographical areas [line items]
Sales revenue	(811,856)	(814,878)	(2,435,819)	(1,916,317)
Operating profit (loss)	(21,639)	(469)	(37,749)	20,308
Assets	138,552	312,330	138,552	312,330
Non-current assets other than financial instruments, deferred tax assets and net defined benefit assets
Reconciling items [member] | External customers [member]
Disclosure of geographical areas [line items]
Sales revenue
Reconciling items [member] | Inter-geographic areas [member]
Disclosure of geographical areas [line items]
Sales revenue	¥ (811,856)	¥ (814,878)	¥ (2,435,819)	¥ (1,916,317)

Segment Information - Supplem_2

Segment Information - Supplemental Geographical Information Based on Location (Parenthetical) (Detail) - JPY (¥) ¥ in Millions	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Disclosure of geographical areas [line items]
Assets	¥ 22,249,779	¥ 21,921,030	¥ 20,780,203
Unallocated corporate assets [member]
Disclosure of geographical areas [line items]
Assets	¥ 847,711		¥ 931,069

Reversal of Impairment Loss O_2

Reversal of Impairment Loss On Investments Accounted For Using The Equity Method - Additional Information (Detail) - JPY (¥) ¥ in Millions	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Investments accounted for using equity method [member] | Target Companies [member] | Automobile business [member]
Disclosure Of Investments Accounted For Using Equity Method [line items]
Reversal of impairment losses	¥ 0	¥ 56,849

Equipment on Operating Leases -

Equipment on Operating Leases - Additional Information (Detail) - JPY (¥) ¥ in Millions	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Lease Income [Abstract]
Additions to equipment on operating leases	¥ 1,636,938	¥ 1,482,193
Sales or disposals of equipment on operating leases	¥ 976,175	¥ 764,146

Property, Plant and Equipment -

Property, Plant and Equipment - Additional Information (Detail) - JPY (¥) ¥ in Millions	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items]
Additions to property, plant and equipment	¥ 1,636,938	¥ 1,482,193
Sales or disposals of property, plant and equipment	976,175	764,146
Property, plant and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Additions to property, plant and equipment	242,976	251,576
Sales or disposals of property, plant and equipment	¥ 21,982	¥ 29,340

Provisions - Components of and

Provisions - Components of and Changes in Provisions (Detail) ¥ in Millions	9 Months Ended
	Dec. 31, 2021JPY (¥)
Disclosure of other provisions [line items]
Beginning balance	¥ 641,041
Provision	90,689
Write-offs	(212,315)
Reversal	(16,006)
Exchange differences on translating foreign operations	11,840
Ending balance	515,249
Product warranties [member]
Disclosure of other provisions [line items]
Beginning balance	481,023	[1]
Provision	85,742	[1]
Write-offs	(135,208)	[1]
Reversal	(14,406)	[1]
Exchange differences on translating foreign operations	8,786	[1]
Ending balance	425,937	[1]
Other [member]
Disclosure of other provisions [line items]
Beginning balance	160,018
Provision	4,947
Write-offs	(77,107)
Reversal	(1,600)
Exchange differences on translating foreign operations	3,054
Ending balance	¥ 89,312
[1]	Honda recognizes provisions for product warranties to cover future product warranty expenses. Honda recognizes costs for general warranties on products Honda sells and for specific warranty programs, including product recalls. Honda recognizes general estimated warranty costs at the time products are sold to customers. Honda also recognizes specific estimated warranty program costs when it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation, and a reliable estimate can be made of the amount of the obligation. These provisions are estimated based on historical warranty claim experience with consideration given to the expected level of future warranty costs as well as current information on repair costs. Provision for product warranties are utilized for expenditures based on the demand from customers and dealers.

Provisions - Current Liabilitie

Provisions - Current Liabilities and Non-current Liabilities of Provisions (Detail) - JPY (¥) ¥ in Millions	Dec. 31, 2021	Mar. 31, 2021
Disclosure of other provisions [abstract]
Current liabilities	¥ 262,373	¥ 362,151
Non-current liabilities	252,876	278,890
Total	¥ 515,249	¥ 641,041

Sales Revenue - Additional Info

Sales Revenue - Additional Information (Detail) - Segments	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Receivables from contracts with customers: [abstract]
Number of reportable segments	4	4

Sales Revenue - Summary of Reco

Sales Revenue - Summary of Reconciliation of the Disaggregated Revenue with the Four Reportable Segments (Detail) - JPY (¥) ¥ in Millions		3 Months Ended		9 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total		¥ 3,688,785	¥ 3,771,569	¥ 10,677,013	¥ 9,546,713
External customers [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total		3,688,785	3,771,569	10,677,013	9,546,713
Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total		3,750,992	3,833,025	10,851,198	9,723,712
Operating segments [member] | Motorcycle business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total		578,366	490,857	1,602,096	1,258,173
Operating segments [member] | Automobile business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total		2,388,753	2,638,115	6,823,677	6,360,937
Operating segments [member] | Financial services business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total		672,611	617,646	2,116,459	1,863,161
Operating segments [member] | Life creation and other businesses [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total		111,262	86,407	308,966	241,441
Operating segments [member] | External customers [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		3,337,412	3,441,947	9,625,416	8,550,734
Revenue arising from the other sources	[1]	351,373	329,622	1,051,597	995,979
Total		3,688,785	3,771,569	10,677,013	9,546,713
Operating segments [member] | External customers [member] | Motorcycle business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		577,197	490,728	1,600,562	1,256,492
Revenue arising from the other sources	[1]	1,169	129	1,534	1,681
Total		578,366	490,857	1,602,096	1,258,173
Operating segments [member] | External customers [member] | Automobile business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		2,330,998	2,583,041	6,661,900	6,197,245
Revenue arising from the other sources	[1]	2,390	2,149	6,757	10,483
Total		2,333,388	2,585,190	6,668,657	6,207,728
Operating segments [member] | External customers [member] | Financial services business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		323,996	287,353	1,071,164	870,099
Revenue arising from the other sources	[1]	347,781	327,196	1,043,171	983,542
Total		671,777	614,549	2,114,335	1,853,641
Operating segments [member] | External customers [member] | Life creation and other businesses [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		105,221	80,825	291,790	226,898
Revenue arising from the other sources	[1]	33	148	135	273
Total		105,254	80,973	291,925	227,171
Operating segments [member] | External customers [member] | Japan [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		424,666	402,095	1,200,716	1,133,155
Operating segments [member] | External customers [member] | Japan [member] | Motorcycle business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		24,897	19,699	78,716	63,671
Operating segments [member] | External customers [member] | Japan [member] | Automobile business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		341,810	334,622	964,125	936,043
Operating segments [member] | External customers [member] | Japan [member] | Financial services business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		35,397	30,291	100,930	91,615
Operating segments [member] | External customers [member] | Japan [member] | Life creation and other businesses [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		22,562	17,483	56,945	41,826
Operating segments [member] | External customers [member] | North America [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		1,582,282	1,816,130	4,875,663	4,428,781
Operating segments [member] | External customers [member] | North America [member] | Motorcycle business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		62,516	48,628	176,848	143,742
Operating segments [member] | External customers [member] | North America [member] | Automobile business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		1,192,577	1,478,347	3,610,940	3,408,131
Operating segments [member] | External customers [member] | North America [member] | Financial services business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		288,582	257,062	970,204	778,483
Operating segments [member] | External customers [member] | North America [member] | Life creation and other businesses [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		38,607	32,093	117,671	98,425
Operating segments [member] | External customers [member] | Europe [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		120,929	112,901	439,714	346,561
Operating segments [member] | External customers [member] | Europe [member] | Motorcycle business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		36,689	22,540	149,675	93,641
Operating segments [member] | External customers [member] | Europe [member] | Automobile business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		66,695	76,339	238,051	213,196
Operating segments [member] | External customers [member] | Europe [member] | Financial services business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers
Operating segments [member] | External customers [member] | Europe [member] | Life creation and other businesses [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		17,545	14,022	51,988	39,724
Operating segments [member] | External customers [member] | Asia [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		1,036,037	969,170	2,626,930	2,310,148
Operating segments [member] | External customers [member] | Asia [member] | Motorcycle business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		363,817	335,336	942,846	802,575
Operating segments [member] | External customers [member] | Asia [member] | Automobile business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		652,468	621,458	1,636,675	1,472,728
Operating segments [member] | External customers [member] | Asia [member] | Financial services business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		17		30	1
Operating segments [member] | External customers [member] | Asia [member] | Life creation and other businesses [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		19,735	12,376	47,379	34,844
Operating segments [member] | External customers [member] | Other regions [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		173,498	141,651	482,393	332,089
Operating segments [member] | External customers [member] | Other regions [member] | Motorcycle business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		89,278	64,525	252,477	152,863
Operating segments [member] | External customers [member] | Other regions [member] | Automobile business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		77,448	72,275	212,109	167,147
Operating segments [member] | External customers [member] | Other regions [member] | Financial services business [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers
Operating segments [member] | External customers [member] | Other regions [member] | Life creation and other businesses [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue arising from contracts with customers		¥ 6,772	¥ 4,851	¥ 17,807	¥ 12,079
[1]	Revenue arising from the other sources primarily includes lease revenues recognized under IFRS 16 and interest recognized under IFRS 9.

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - JPY (¥) ¥ in Millions	9 Months Ended	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2021
Disclosure of fair value measurement of assets [abstract]
Percentage of auction rate securities guaranteed by government	95.00%
Transfers out of Level 1 into Level 2 of fair value hierarchy	¥ 0	¥ 0
Transfers out of Level 2 into Level 1 of fair value hierarchy	¥ 0	¥ 0

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - JPY (¥) ¥ in Millions	Dec. 31, 2021	Mar. 31, 2021
Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	¥ 214,237	¥ 173,302
Measured at fair value on a recurring basis [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	682,839	531,640
Other financial liabilities	63,823	82,256
Measured at fair value on a recurring basis [member] | Financial liabilities measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities	28,128	17,343
Measured at fair value on a recurring basis [member] | Financial liabilities measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities	35,695	64,913
Measured at fair value on a recurring basis [member] | Financial liabilities measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities	63,823	82,256
Measured at fair value on a recurring basis [member] | Financial assets measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	27,718	43,782
Measured at fair value on a recurring basis [member] | Financial assets measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	59,913	60,367
Measured at fair value on a recurring basis [member] | Financial assets measured at fair value through profit or loss [member] | Other [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	4,607	4,829
Measured at fair value on a recurring basis [member] | Financial assets measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	92,238	108,978
Measured at fair value on a recurring basis [member] | Financial assets measured at fair value through profit or loss [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	101,211	68,323
Measured at fair value on a recurring basis [member] | Financial assets measured at fair value through other comprehensive income [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	17,627	10,134
Measured at fair value on a recurring basis [member] | Financial assets measured at fair value through other comprehensive income [member] | Equity securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	471,763	344,205
Measured at fair value on a recurring basis [member] | Level 1 [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	394,743	260,725
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial liabilities measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial liabilities measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial liabilities measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial assets measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial assets measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial assets measured at fair value through profit or loss [member] | Other [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial assets measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial assets measured at fair value through profit or loss [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	41,997	26,570
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial assets measured at fair value through other comprehensive income [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 1 [member] | Financial assets measured at fair value through other comprehensive income [member] | Equity securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	352,746	234,155
Measured at fair value on a recurring basis [member] | Level 2 [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	160,100	150,722
Other financial liabilities	63,823	82,256
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial liabilities measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities	28,128	17,343
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial liabilities measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities	35,695	64,913
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial liabilities measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities	63,823	82,256
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial assets measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	27,718	43,782
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial assets measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	59,913	60,367
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial assets measured at fair value through profit or loss [member] | Other [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial assets measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	87,631	104,149
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial assets measured at fair value through profit or loss [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	54,842	36,439
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial assets measured at fair value through other comprehensive income [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	17,627	10,134
Measured at fair value on a recurring basis [member] | Level 2 [member] | Financial assets measured at fair value through other comprehensive income [member] | Equity securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 3 [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	127,996	120,193
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial liabilities measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial liabilities measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial liabilities measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial liabilities
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial assets measured at fair value through profit or loss [member] | Foreign exchange instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial assets measured at fair value through profit or loss [member] | Interest rate instruments [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial assets measured at fair value through profit or loss [member] | Other [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	4,607	4,829
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial assets measured at fair value through profit or loss [member] | Derivatives [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	4,607	4,829
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial assets measured at fair value through profit or loss [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	4,372	5,314
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial assets measured at fair value through other comprehensive income [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets
Measured at fair value on a recurring basis [member] | Level 3 [member] | Financial assets measured at fair value through other comprehensive income [member] | Equity securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Other financial assets	¥ 119,017	¥ 110,050

Fair Value - Carrying Amounts a

Fair Value - Carrying Amounts and Fair Values of Financial Assets and Financial Liabilities Measured at Amortized Cost (Detail) - JPY (¥) ¥ in Millions	Dec. 31, 2021	Mar. 31, 2021
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Receivables from financial services	¥ 5,287,441	¥ 5,414,550
Financing liabilities	7,589,741	7,720,985
Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Debt securities	214,237	173,302
Fair value [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Receivables from financial services	5,338,370	5,488,065
Financing liabilities	7,631,960	7,809,379
Fair value [member] | Debt securities [member]
Disclosures of fair value of financial assets and financial liabilities at amortized cost [Line items]
Debt securities	¥ 214,237	¥ 173,302

Earning Per Share - Summary of

Earning Per Share - Summary of Earnings Per Share (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Earnings per share [abstract]
Profit for the period attributable to owners of the parent	¥ 192,960	¥ 284,051	¥ 582,169	¥ 444,102
Weighted average number of common shares outstanding, basic	1,716,433,911	1,726,645,596	1,722,778,664	1,726,634,998
Basic earnings per share attributable to owners of the parent	¥ 112.42	¥ 164.51	¥ 337.92	¥ 257.21

Dividend - Summary of Dividends

Dividend - Summary of Dividends from Retained Earnings (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions	Nov. 05, 2021	May 14, 2021	Nov. 06, 2020	Aug. 05, 2020	May 12, 2020
Dividends 1 [abstract]
Dividend payout, Total amount of dividends (millions of yen)	¥ 95,130	¥ 93,272	¥ 32,818	¥ 18,999	¥ 48,363
Dividend payout, Dividend per share (yen)	¥ 55	¥ 54	¥ 19	¥ 11	¥ 28
Dividend payout, Record date	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Dividend payout, Effective date	Dec. 1, 2021	Jun. 7, 2021	Dec. 2, 2020	Sep. 4, 2020	Jun. 3, 2020