Short-term Borrowings and Long-term Debt - Fair Value of Debt, Other Borrowing (Details) - USD ($) $ in Billions	Mar. 31, 2016	Mar. 31, 2015
Fair Value of Debt
Weighted average cost of borrowings	2.08%	1.82%
Level 2
Fair Value of Debt
Fair value of debt	$ 1.6

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

No definition available.

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant