CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified	Predecessor [Member]	Successor [Member]	Successor [Member] Common Stock [Member]	Successor [Member] Additional Paid-in Capital [Member]	Successor [Member] Retained Earnings [Member]	Successor [Member] Accumulated Other Comprehensive Loss [Member]
Balance at Mar. 31, 2014		$ 25,312	$ 39	$ 27,354	$ (2,038)	$ (43)
Balance (in shares) at Mar. 31, 2014			3,941,000,000
Common Stock, Shares, Issued		3,945,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		23			23
Other Comprehensive Income (Loss), Net of Tax		0
Stock Issued During Period, Shares, New Issues			4,000,000
Stock Issued During Period, Value, New Issues		9	0	9
Stock Issued During Period, Value, Treasury Stock Reissued					0
Share-based compensation expense		20		20
Balance at Jun. 30, 2014		$ 25,364	$ 39	$ 27,383	$ (2,015)	$ (43)
Balance (in shares) at Jun. 30, 2014			3,945,000,000