Supplemental Financial Information (Tables)

12 Months Ended

Mar. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of Supplemental Balance Sheet Disclosures

	March 31,
	2019			2018
	(in millions)
Accounts and notes receivable, net
Trade	$	3,024		$	2,916
Unbilled trade installment receivables and other	893			1,204
Less allowances for doubtful accounts and deferred interest	(363		)	(409		)
	$	3,554		$	3,711
Prepaid expenses and other current assets
Prepaid expenses	$	278		$	263
Contract assets	690			—
Deferred charges and other	321			312
	$	1,289		$	575
Other assets
Unbilled trade installment receivables, net	$	247		$	154
Investments	60			197
Restricted cash	81			49
Contract assets	238			—
Other	492			521
	$	1,118		$	921
Accounts payable(1)
Trade	$	3,462		$	3,068
Accrued interconnection costs	90			80
Capital expenditures and other	409			261
	$	3,961		$	3,409
Accrued expenses and other current liabilities
Deferred revenues	$	288		$	1,454
Accrued interest	359			423
Accrued taxes	301			410
Payroll and related	555			405
Accrued legal reserves	180			194
Severance, lease and other exit costs	50			108
Contract liabilities	962			—
Asset retirement obligations	44			145
Unfavorable lease liabilities	137			152
Other	721			671
	$	3,597		$	3,962
Other liabilities
Deferred rental income-communications towers	$	187		$	199
Deferred rent	631			605
Long-term asset retirement obligations	622			486
Long-term unfavorable lease liabilities	200			337
Postretirement benefits and other non-current employee related liabilities	789			833
Deferred spectrum lease liability	486			416
Contract liabilities	47			—
Other	475			607
	$	3,437		$	3,483

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(1) Includes liabilities in the amounts of $75 million and $66 million as of March 31, 2019 and 2018, respectively, for payments issued in excess of associated bank balances but not yet presented for collection.