XML 118 R87.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) | 12 Months Ended
--- | ---
Mar. 31, 2017 USD ($)
Statement of Comprehensive Income [Abstract] |
Other comprehensive loss before reclassifications | $ 0

X
- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive (income) loss related to net period benefit cost (credit) for pension and other postretirement defined benefit plans. + References No definition available. + Details
Name: | us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration