Investment in and Advances to Non-Consolidated Affiliates and Related Party Transactions (Tables)

12 Months Ended

Mar. 31, 2017

Investment In and Advances To Non-Consolidated Affiliates and Related Party Transactions [Abstract]

Schedule of equity method investments, ownership percentage

The following table summarizes the ownership structure and our ownership percentage of the non-consolidated affiliate in which we have an investment as of March 31, 2017 and 2016, and which we account for using the equity method. We do not control our non-consolidated affiliate, but have the ability to exercise significant influence over the operating and financial policies. We have no material investments that we account for using the cost method.

Affiliate Name	Ownership Structure	Ownership Percentage
Aluminium Norf GmbH (Alunorf)	Corporation	50%

Period-end account balances with non-consolidated affiliates, shown as related party balances

Included in the accompanying consolidated financial statements are transactions and balances arising from business we conduct with Alunorf, which we classify as related party transactions and balances. The following table describes the period-end account balances that we had with Norf, shown as related party balances in the accompanying consolidated balance sheets (in millions). We had no other material related party balances with non-consolidated affiliates.

	March 31,
	2017		2016
Accounts receivable-related parties	$	60	$	59
Other long-term assets-related parties	$	15	$	16
Accounts payable-related parties	$	51	$	48

The following table summarizes the assets, liabilities and equity of our equity method affiliate in the aggregate as of March 31, 2017 and 2016 (in millions).

	March 31,
	2017		2016
Assets:
Current assets	$	143	$	148
Non-current assets	355		394
Total assets	$	498	$	542
Liabilities:
Current liabilities	$	53	$	55
Non-current liabilities	283		337
Total liabilities	336		392
Equity:
Total equity	162		150
Total liabilities and equity	$	498	$	542

Summary of condensed results of operations of equity method affiliates

The following table summarizes the results of operations of our equity method affiliates in the aggregate for the years ending March 31, 2017, 2016 and 2015; and the nature and amounts of significant transactions that we had with our non-consolidated affiliates (in millions). The amounts in the table below are disclosed at 100% of the operating results of these affiliates.

	Year Ended March  31,
	2017			2016			2015
Net sales	$	447		$	464		$	524
Costs and expenses related to net sales	463			463			527
(Benefit) provision for taxes on income	(5		)	2			—
Net loss	$	(11	)	$	(1	)	$	(3	)
Purchase of tolling services from Alunorf	$	224		$	232		$	261