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, 2014	$ 7,738	$ 915	$ 2	$ 200	$ 6,621
Net income	962				962
Other comprehensive income (loss), net of tax	6			6
Dividend	(435)				(435)
Balance at Dec. 31, 2014	8,271	915	2	206	7,148
Balance at Mar. 31, 2015	8,520	915	2	220	7,383
Net income	742				742
Other comprehensive income (loss), net of tax	(85)			(85)
Balance at Dec. 31, 2015	$ 9,177	$ 915	$ 2	$ 135	$ 8,125