Consolidated Statement of Shareholder's Equity (USD $) In Millions	Total	Capital stock	Additional paid-in capital	Accumulated other comprehensive (loss) income	Retained earnings
BALANCE AT at Mar. 31, 2011	$ 6,856	$ 915	$ 1	$ 100	$ 5,840
Net income	465	0	0	0	465
Other comprehensive income, net of tax	10	0	0	10	0
Total comprehensive income	475
BALANCE AT at Jun. 30, 2011	7,331	915	1	110	6,305
BALANCE AT at Mar. 31, 2012	7,662	915	2	160	6,585
Net income	477	0	0	0	477
Other comprehensive income, net of tax	9	0	0	9	0
Total comprehensive income	486
BALANCE AT at Jun. 30, 2012	$ 8,148	$ 915	$ 2	$ 169	$ 7,062