CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Successor [Member]
Cash flows from operating activities
Net income (loss)	$ 23	$ (114)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	1,281	0
Provision for losses on accounts receivable	225	0
Share-based and long-term incentive compensation expense	26	0
Deferred income tax (benefit) expense	(23)	(61)
Equity in losses of unconsolidated investments, net	0	0
Contribution to pension plan	(10)	0
Amortization and accretion of long-term debt premiums and discounts	(74)	0
Change in fair value of derivative	0	167
Other changes in assets and liabilities:
Accounts and notes receivable	(369)	7
Inventories and other current assets	(97)	0
Accounts payable and other current liabilities	(272)	1
Non-current assets and liabilities, net	(66)	0
Other, net	35	8
Net cash provided by operating activities	679	8
Cash flows from investing activities
Capital expenditures	(1,246)	0
Expenditures relating to FCC licenses	(41)	0
Licensee Reimbursed share of costs	95	0
Acquisitions, net of cash acquired	0	0
Investment in Clearwire (including debt securities)	0	0
Proceeds from sales and maturities of short-term investments	900	0
Purchases of short-term investments	(1,002)	0
Other, net	17	0
Net Cash Provided by (Used in) Investing Activities	(1,277)	0
Cash flows from financing activities
Repayments of debt and capital lease obligations	(210)	0
Debt financing costs	0	0
Proceeds from issuance of common stock and warrants, net	9	0
Net cash provided by (used in) financing activities	(201)	0
Net increase (decrease) in cash and cash equivalents	(799)	8
Cash and cash equivalents, beginning of period	4,970	3
Cash and cash equivalents, end of period	4,171	11
Predecessor [Member]
Cash flows from operating activities
Net income (loss)		(1,597)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization		1,632
Provision for losses on accounts receivable		99
Share-based and long-term incentive compensation expense		16
Deferred income tax (benefit) expense		52
Equity in losses of unconsolidated investments, net		(257)
Contribution to pension plan		0
Amortization and accretion of long-term debt premiums and discounts		13
Change in fair value of derivative		0
Other changes in assets and liabilities:
Accounts and notes receivable		(143)
Inventories and other current assets		93
Accounts payable and other current liabilities		614
Non-current assets and liabilities, net		189
Other, net		10
Net cash provided by operating activities		1,235
Cash flows from investing activities
Capital expenditures		(1,571)
Expenditures relating to FCC licenses		(68)
Licensee Reimbursed share of costs		0
Acquisitions, net of cash acquired		(509)
Investment in Clearwire (including debt securities)		(160)
Proceeds from sales and maturities of short-term investments		949
Purchases of short-term investments		(295)
Other, net		0
Net Cash Provided by (Used in) Investing Activities		(1,654)
Cash flows from financing activities
Repayments of debt and capital lease obligations		(303)
Debt financing costs		(1)
Proceeds from issuance of common stock and warrants, net		44
Net cash provided by (used in) financing activities		(260)
Net increase (decrease) in cash and cash equivalents		(679)
Cash and cash equivalents, beginning of period		6,275
Cash and cash equivalents, end of period		$ 5,596