CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended		3 Months Ended
	Sep. 30, 2014 Successor [Member]	Sep. 30, 2013 Successor [Member]	Jul. 10, 2013 Predecessor [Member]
Proceeds from sales of assets and FCC Licenses	$ 101	$ 3	$ 4
Cash flows from operating activities
Net (loss) income	(742)	(813)	(515)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	2,575	1,403	1,753
Provision for losses on accounts receivable	493	119	111
Share-based and long-term incentive compensation expense	65	58	20
Deferred income tax (benefit) expense	28	23	1,562
Equity in losses of unconsolidated investments, net	0	0	(280)
Gain on previously-held equity interests	0	0	2,926
Interest expense related to beneficial conversion feature on convertible bond	0	0	247
Contribution to pension plan	(22)	0	0
Amortization and accretion of long-term debt premiums and discounts	(149)	(86)	(5)
Other changes in assets and liabilities:
Accounts and notes receivable	(828)	(54)	(65)
Inventories and other current assets	(155)	(72)	55
Accounts payable and other current liabilities	503	159	1,014
Non-current assets and liabilities, net	(124)	(153)	191
Other, net	63	118	9
Net cash provided by operating activities	1,707	702	1,731
Cash flows from investing activities
Capital expenditures	(2,389)	(1,878)	(1,759)
Expenditures relating to FCC licenses	(79)	(31)	(70)
Licensee Reimbursed share of costs	95	0	0
Acquisitions, net of cash acquired	0	(14,112)	(4,039)
Investment in Clearwire (including debt securities)	0	0	(228)
Proceeds from sales and maturities of short-term investments	1,842	479	1,164
Purchases of short-term investments	(1,789)	(815)	(295)
Other, net	(6)	(3)	(4)
Net Cash Provided by (Used in) Investing Activities	(2,225)	(19,407)	(5,227)
Increase in restricted cash	0	(3,050)	0
Cash flows from financing activities
Proceeds from debt and financings	0	6,826	0
Repayments of debt and capital lease obligations	(363)	(497)	(303)
Debt financing costs	0	(107)	(1)
Proceeds from issuance of common stock and warrants, net	46	18,552	53
Other, net	0	(14)	0
Net cash provided by (used in) financing activities	(317)	24,760	(251)
Net increase (decrease) in cash and cash equivalents	(835)	6,055	(3,747)
Cash and cash equivalents, beginning of period	4,970	3	6,275
Cash and cash equivalents, end of period	$ 4,135	$ 6,058	$ 2,528