SUMMARY OF ACCOUNTING POLICIES - Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2014
Other Current Assets / Liabilities
Assets financed by a third party banking institution included in other current assets	$ 169,200	$ 83,600
Equity investments in non-majority owned companies	87,000	122,900
Customer working capital advances and accruals included in other current liabilities	189,600	253,700
Deferred revenue	272,600	332,300
Deferred tax liability, noncurrent	117,930	100,528
Other acquisitions
Other Current Assets / Liabilities
Assets financed by a third party banking institution included in other current assets	169,200	83,600
Other current liability for purchase of assets on behalf of customer financed by a third party banking institution	197,700	122,000
Other current assets | Other acquisitions
Other Current Assets / Liabilities
Receivable for customer specific assets sold to third party bank		36,700
Customer Related Accruals
Other Current Assets / Liabilities
Customer working capital advances and accruals included in other current liabilities	454,800	479,500
Adjustments for New Accounting Pronouncement
Other Current Assets / Liabilities
Deferred tax assets, current		66,300
Deferred tax liabilities, current		9,100
Adjustments for New Accounting Pronouncement | Short-term and Long-term Debt
Other Current Assets / Liabilities
Reclassification of debt issuance costs	12,700
Adjustments for New Accounting Pronouncement | Other Assets
Other Current Assets / Liabilities
Reclassification of debt issuance costs	(12,700)
Asset-Backed Securitization Programs
Other Current Assets / Liabilities
Other current assets	$ 600,672	$ 501,097	$ 470,908