SUPPLEMENTARY CONSOLIDATED FINANCIAL STATEMENT SCHEDULE VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 174	$ 134	$ 136
Charged to Costs and Expense	113	75	36
Charged to Other Accounts	(1)	0	(1)
Deductions From Allowance Accounts	(33)	(35)	(37)
Balance at End of Year	253	174	134
Allowances for doubtful accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	141	112	121
Charged to Costs and Expense	113	67	36
Charged to Other Accounts	2	0	(11)
Deductions From Allowance Accounts	(44)	(38)	(34)
Balance at End of Year	212	141	112
Other allowances
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	33	22	15
Charged to Costs and Expense	0	8	0
Charged to Other Accounts	(3)	0	10
Deductions From Allowance Accounts	11	3	(3)
Balance at End of Year	41	33	22
Written off
Valuation and Qualifying Accounts Disclosure [Line Items]
Deductions From Allowance Accounts	(33)	(34)	(39)
Credited to other accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Deductions From Allowance Accounts	0	(1)	2
Amounts shown as deductions from current and non-current receivables
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	174	134
Balance at End of Year	$ 253	$ 174	$ 134