Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
OPERATING ACTIVITIES
Net income	$ 104	$ 203	$ 90
Adjustments to determine net cash provided by operating activities:
Depreciation and amortization	334	292	329
Gain on unrealized derivatives and other realized derivatives in investing activities, net	(3)	(28)	(7)
(Gain) loss on assets held for sale	(6)	(3)	111
Loss on extinguishment of debt	0	7	0
Deferred income taxes	(129)	(31)	(33)
Amortization of fair value adjustments, net	12	12	16
Equity in net loss of non-consolidated affiliates	12	16	13
(Gain) loss on foreign exchange remeasurement of debt	(2)	8	13
Loss on sale of assets	9	6	3
Impairment charges	24	4	46
Amortization of debt issuance costs and carrying value adjustment	26	27	25
Other, net	(4)	1	3
Changes in assets and liabilities including assets and liabilities held for sale (net of effects from divestitures):
Accounts receivable	106	(121)	47
Inventories	17	(160)	214
Accounts payable	159	6	(188)
Other current assets	0	(36)	(10)
Other current liabilities	32	28	(67)
Other noncurrent assets	(9)	(10)	9
Other noncurrent liabilities	20	(18)	(58)
Net cash provided by operating activities	702	203	556
INVESTING ACTIVITIES
Capital expenditures	(717)	(775)	(516)
Proceeds from sales of assets, third party, net of transaction fees	8	19	12
Proceeds from the sale of assets, related party, net of transaction fees	8	2	4
(Outflows) proceeds from investment in and advances to non–consolidated affiliates, net	(16)	3	(1)
Proceeds from settlement of other undesignated derivative instruments, net	15	4	59
Net cash used in investing activities	(702)	(747)	(442)
FINANCING ACTIVITIES
Proceeds from issuance of debt	169	319	271
Principal payments	(164)	(97)	(22)
Short–term borrowings, net	208	332	2
Dividends, noncontrolling interest	0	(2)	(1)
Acquisition of noncontrolling interest in Novelis Korea Ltd.	0	(9)	(344)
Debt issuance costs	(8)	(8)	(2)
Net cash provided by (used in) financing activities	205	535	(96)
Net increase (decrease) in cash and cash equivalents	205	(9)	18
Effect of exchange rate changes on cash	3	(7)	(12)
Cash and cash equivalents — beginning of period	301	317	311
Cash and cash equivalents — end of period	$ 509	$ 301	$ 317