Consolidated Statement of Shareholder's Equity - USD ($) $ in Millions	Total	Capital stock	Additional paid-in capital	Accumulated other comprehensive income	Retained earnings
Balance at Mar. 31, 2015	$ 8,520	$ 915	$ 2	$ 220	$ 7,383
Net income	400				400
Other comprehensive income (loss), net of tax	(62)			(62)
Balance at Sep. 30, 2015	8,858	915	2	158	7,783
Balance at Mar. 31, 2016	9,397	915	2	165	8,315
Net income	404				404
Other comprehensive income (loss), net of tax	1			1
Balance at Sep. 30, 2016	$ 9,802	$ 915	$ 2	$ 166	$ 8,719