CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (1,206)	$ (1,995)	$ (3,345)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Asset impairments	0	0	2,133	[1]
Depreciation and amortization	8,150	7,088	5,349
Provision for losses on accounts receivable	555	455	892
Share-based and long-term incentive compensation expense	93	75	86
Deferred income tax (benefit) expense	433	123	(609)
Gains from asset dispositions and exchanges	354	0	0
Amortization and accretion of long-term debt premiums and discounts	(302)	(316)	(303)
Loss on disposal of property, plant and equipment	509	487	0
Litigation	140	193	91
Contract terminations	111	0	0
Other changes in assets and liabilities:
Accounts and notes receivable	(1,017)	(1,663)	(644)
Deferred purchase price from sale of receivables	(289)	2,478	0
Inventories and other current assets	(2,305)	(3,065)	(1,573)
Accounts payable and other current liabilities	(365)	(574)	481
Non-current assets and liabilities, net	(308)	111	(199)
Other, net	323	500	91
Net cash provided by (used in) operating activities	4,168	3,897	2,450
Cash flows from investing activities:
Capital expenditures - network and other	(1,950)	(4,680)	(5,422)
Capital expenditures - leased devices	(1,925)	(2,292)	(582)
Expenditures relating to FCC licenses	(83)	(98)	(163)
Reimbursements related to FCC licenses	0	0	95
Proceeds from sales and maturities of short-term investments	4,621	418	3,131
Purchases of short-term investments	(10,065)	(252)	(2,077)
Proceeds from sale of assets and FCC licenses	219	62	315
Proceeds from sale-leaseback transaction	0	1,136	0
Other, net	(42)	(29)	(11)
Net cash used in investing activities	(9,225)	(5,735)	(4,714)
Cash flows from financing activities:
Proceeds from debt and financings	10,966	1,355	1,930
Repayments of debt, financing and capital lease obligations	(5,417)	(899)	(574)
Debt financing costs	(358)	(11)	(87)
Other, net	95	24	35
Net cash provided by (used in) financing activities	5,286	469	1,304
Net (decrease) increase in cash and cash equivalents	229	(1,369)	(960)
Cash and cash equivalents, beginning of period	2,641	4,010	4,970
Cash and cash equivalents, end of period	$ 2,870	$ 2,641	$ 4,010

[1] (2)Impairments for the year ended March 31, 2015 consist of a $1.9 billion trade name impairment related to the Wireless segment and a $233 million impairment related to Wireline long-lived assets.