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Changes in the Allowance for Doubtful Receivables on Direct Financing Leases and Probable Loan Losses (Detail)
In Millions

12 Months Ended

Mar. 31, 2011

USD ($)

Mar. 31, 2011

JPY (¥)

Mar. 31, 2010

JPY (¥)

Mar. 31, 2011

Direct Financing Leases and Probable Loan Losses

USD ($)

Mar. 31, 2011

Direct Financing Leases and Probable Loan Losses

JPY (¥)

Mar. 31, 2010

Direct Financing Leases and Probable Loan Losses

JPY (¥)

Mar. 31, 2009

Direct Financing Leases and Probable Loan Losses

JPY (¥)

Beginning balance

$ 1,854

¥ 154,150

¥ 157,523

$ 1,894

¥ 157,523

¥ 158,544

¥ 102,007

Effect of the application of the new accounting standards

387

^[1]

32,181

^[1]

0

^[1]

0

^[1]

Beginning balance after the application of the new accounting standards

2,281

189,704

158,544

102,007

Provision charged to income

374

31,122

71,529

76,985

Charge-offs

(743)

(61,829)

(60,412)

(21,027)

Recoveries

2

175

2,615

1,296

Other

(60)

^[2]

(5,022)

^[2]

(14,753)

^[2]

(717)

^[2]

Ending balance

$ 1,854

¥ 154,150

¥ 157,523

$ 1,854

¥ 154,150

¥ 157,523

¥ 158,544

[1]	This effect results from our application of the new accounting standards for consolidation of VIEs under ASU 2009-16 and ASU 2009-17, effective April 1, 2010.
[2]	Other includes foreign currency translation adjustments, amounts reclassified to discontinued operations and decrease in allowance related to sales of subsidiaries.

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ Details

Name:	ix_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	ix
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Financing Receivable, Allowance for Credit Losses, Beginning Balance Restated

+ Details

Name:	ix_FinancingReceivableAllowanceForCreditLossesBeginningBalanceRestated
Namespace Prefix:	ix
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The effect of a change in method or methods for calculating the allowance for credit losses on the current period provision.

+ Details

Name:	ix_FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod
Namespace Prefix:	ix
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Financing Receivable, Allowance for Credit Losses, Other Adjustments

+ Details

Name:	ix_FinancingReceivableAllowanceForCreditLossesOtherAdjustments
Namespace Prefix:	ix
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Charge to expense for financing receivables that are expected to be uncollectible.

+ Details

Name:	ix_FinancingReceivableAllowanceForCreditLossesProvisions
Namespace Prefix:	ix
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Financing Receivable Allowance For Credit Losses Recoveries Previous Write Off

+ Details

Name:	ix_FinancingReceivableAllowanceForCreditLossesRecoveriesPreviousWriteOff
Namespace Prefix:	ix
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Reduction to the allowance for credit losses related to financing receivables deemed uncollectible.

+ Details

Name:	ix_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix:	ix
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration