CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Predecessor [Member]	Predecessor [Member] Common Stock [Member]	Predecessor [Member] Additional Paid-in Capital [Member]	Predecessor [Member] Retained Earnings [Member]	Predecessor [Member] Accumulated Other Comprehensive Loss [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]	SoftBank [Member] Successor [Member]	SoftBank [Member] Successor [Member] Common Stock [Member]	SoftBank [Member] Successor [Member] Additional Paid-in Capital [Member]
Balance at Dec. 31, 2012	$ 7,087	$ 6,019	$ 47,016	$ (44,815)	$ (1,133)
Balance (in shares) at Dec. 31, 2012		3,010
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,158)			(1,158)
Other Comprehensive Income, Net of Tax	23				23
Stock Issued During Period, Shares, New Issues		16
Stock Issued During Period, Value, New Issues	60	33	27
Share-based compensation expense	18		18
Stock Issued During Period, Shares, Conversion of Convertible Securities		590
Stock Issued During Period, Value, Conversion of Convertible Securities		1,181
Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature			1,919
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	3,100
Balance at Jul. 10, 2013	9,130	7,233	48,980	(45,973)	(1,110)
Balance (in shares) at Jul. 10, 2013		3,616
Balance at Dec. 31, 2012						3,110	0	3,137	(27)	0
Balance (in shares) at Dec. 31, 2012							0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payments for Merger Related Costs								97
Net loss						(822)			(822)
Other Comprehensive Income, Net of Tax						4				4
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised							4
Value of Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised						12	0	12	0
Share-based compensation expense						19		19
Stock Issued During Period, Shares, Acquisitions							851					3,076
Stock Issued During Period, Value, Acquisitions						5,344	8	5,336			18,401	31	18,370
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options						193		193
Adjustments to Additional Paid in Capital, Warrant Issued						139		139
Adjustments to Additional Paid in Capital, Return of Capital to Acquirer, prior to acquisition						(14)		(14)
Balance at Sep. 30, 2013						26,483	39	27,289	(849)	4
Balance (in shares) at Sep. 30, 2013							3,931
Balance at Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	1,082
Other Comprehensive Income, Net of Tax	(42)
Balance at Jul. 10, 2013	9,130
Balance at Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss						(699)
Other Comprehensive Income, Net of Tax						4
Balance at Sep. 30, 2013						$ 26,483