CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions	Dec. 31, 2015	Mar. 31, 2015
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 38	$ 204
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common shares, shares authorized	9,000,000,000	9,000,000,000
Common Stock, Shares, Issued	3,970,000,000	3,967,000,000