Consolidated Statements of Shareholder's Equity - USD ($) $ in Millions	Total	Capital stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Retained earnings
Balance at Mar. 31, 2015	$ 8,520	$ 915	$ 2	$ 220	$ 7,383
Net income	932	0	0	0	932
Other comprehensive loss, net of tax	(55)	0	0	(55)	0
Balance at Mar. 31, 2016	9,397	915	2	165	8,315
Net income	267	0	0	0	267
Other comprehensive loss, net of tax	(140)	0	0	(140)	0
Balance at Mar. 31, 2017	9,524	915	2	25	8,582
Net income	3,410	0	0	0	3,410
Other comprehensive loss, net of tax	(54)	0	0	(54)	0
Balance at Mar. 31, 2018	$ 12,880	$ 915	$ 2	$ (29)	$ 11,992