CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Revenue, Net [Abstract]
Service	$ 6,516	$ 7,037
Equipment	1,496	990
Net operating revenues	8,012	8,027
Net operating expenses
Cost of Services (exclusive of depreciation and amortization included below)	2,099	2,393
Cost of Products (exclusive of depreciation and amortization included below)	1,419	1,365
Selling, general and administrative	1,917	2,187
Severance and exit costs	16	13
Depreciation	1,680	1,241
Amortization	287	347
Other, net	233	(20)
Total costs and expenses	7,651	7,526
Operating Income	361	501
Other (expense) income
Interest Expense	(615)	(542)
Other income, net	8	4
Nonoperating Expense	(607)	(538)
Loss (income) before income taxes	(246)	(37)
Income tax benefit	(56)	17
Net (loss) income	$ (302)	$ (20)
Basic net (loss) income per common share	$ (0.08)	$ (0.01)
Diluted net (loss) income per common share	$ (0.08)	$ (0.01)
Basic weighted average common shares outstanding	3,975	3,967
Diluted weighted average common shares outstanding	3,975	3,967
Other comprehensive (loss) income, net of tax:
Net unrealized holding gains on securities and other	$ (2)	$ 2
Net unrecognized net periodic pension and other postretirement benefits	1	2
Other comprehensive income	(1)	4
Comprehensive (loss) income	$ (303)	$ (16)