Guarantor Financial Information CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Successor [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	$ 8,789	$ 0
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)	4,678	0
Selling, general and administrative	2,284	22
Severance, exit costs and asset impairments	27	0
Depreciation	868	0
Amortization	413	0
Total costs and expenses	8,270	22
Operating income (Loss)	519	(22)
Other (expense) income
Interest and Other Income	3
Interest Expense	(512)	0
Income (Loss) from Equity Method Investments	0	0
Income (Loss) from Subsidiaries, before Tax	0
Other nonoperating income (expense), excluding interest income	(2)
Nonoperating Income (Expense)	(511)	(153)
Loss (income) before income taxes	8	(175)
Income tax benefit (expense)	15	61
Net income (loss)	23	(114)
Other Comprehensive Income (Loss), Net of Tax	0	96
Comprehensive (loss) income	23	(18)
Successor [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	0
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)	0
Selling, general and administrative	0
Severance, exit costs and asset impairments	0
Depreciation	0
Amortization	0
Total costs and expenses	0
Operating income (Loss)	0
Other (expense) income
Interest and Other Income	23
Interest Expense	(368)
Income (Loss) from Subsidiaries, before Tax	368
Other nonoperating income (expense), excluding interest income	0
Nonoperating Income (Expense)	23
Loss (income) before income taxes	23
Income tax benefit (expense)	0
Net income (loss)	23
Other Comprehensive Income (Loss), Net of Tax	0
Comprehensive (loss) income	23
Successor [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	8,789
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)	4,678
Selling, general and administrative	2,284
Severance, exit costs and asset impairments	27
Depreciation	868
Amortization	413
Total costs and expenses	8,270
Operating income (Loss)	519
Other (expense) income
Interest and Other Income	0
Interest Expense	(164)
Income (Loss) from Subsidiaries, before Tax	0
Other nonoperating income (expense), excluding interest income	(2)
Nonoperating Income (Expense)	(166)
Loss (income) before income taxes	353
Income tax benefit (expense)	15
Net income (loss)	368
Other Comprehensive Income (Loss), Net of Tax	0
Comprehensive (loss) income	368
Successor [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	0
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)	0
Selling, general and administrative	0
Severance, exit costs and asset impairments	0
Depreciation	0
Amortization	0
Total costs and expenses	0
Operating income (Loss)	0
Other (expense) income
Interest and Other Income	(189)
Interest Expense	189
Income (Loss) from Subsidiaries, before Tax	(391)
Other nonoperating income (expense), excluding interest income	0
Nonoperating Income (Expense)	(391)
Loss (income) before income taxes	(391)
Income tax benefit (expense)	0
Net income (loss)	(391)
Other Comprehensive Income (Loss), Net of Tax	0
Comprehensive (loss) income	(391)
Successor [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	0
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)	0
Selling, general and administrative	0
Severance, exit costs and asset impairments	0
Depreciation	0
Amortization	0
Total costs and expenses	0
Operating income (Loss)	0
Other (expense) income
Interest and Other Income	169
Interest Expense	(169)
Income (Loss) from Subsidiaries, before Tax	23
Other nonoperating income (expense), excluding interest income	0
Nonoperating Income (Expense)	23
Loss (income) before income taxes	23
Income tax benefit (expense)	0
Net income (loss)	23
Other Comprehensive Income (Loss), Net of Tax	0
Comprehensive (loss) income	23
Predecessor [Member]
Condensed Income Statements, Captions [Line Items]
Revenues		8,877
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)		5,045
Selling, general and administrative		2,442
Severance, exit costs and asset impairments		632
Depreciation		1,563
Amortization		69
Total costs and expenses		9,751
Operating income (Loss)		(874)
Other (expense) income
Interest and Other Income		17
Interest Expense		(428)
Income (Loss) from Equity Method Investments		(257)
Income (Loss) from Subsidiaries, before Tax		0
Other nonoperating income (expense), excluding interest income		0
Nonoperating Income (Expense)		(668)
Loss (income) before income taxes		(1,542)
Income tax benefit (expense)		(55)
Net income (loss)		(1,597)
Other Comprehensive Income (Loss), Net of Tax		51
Comprehensive (loss) income		(1,546)
Predecessor [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues		0
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)		0
Selling, general and administrative		0
Severance, exit costs and asset impairments		0
Depreciation		0
Amortization		0
Total costs and expenses		0
Operating income (Loss)		0
Other (expense) income
Interest and Other Income		29
Interest Expense		(291)
Income (Loss) from Equity Method Investments		0
Income (Loss) from Subsidiaries, before Tax		(1,335)
Other nonoperating income (expense), excluding interest income		0
Nonoperating Income (Expense)		(1,597)
Loss (income) before income taxes		(1,597)
Income tax benefit (expense)		0
Net income (loss)		(1,597)
Other Comprehensive Income (Loss), Net of Tax		51
Comprehensive (loss) income		(1,546)
Predecessor [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues		8,877
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)		5,045
Selling, general and administrative		2,442
Severance, exit costs and asset impairments		632
Depreciation		1,563
Amortization		69
Total costs and expenses		9,751
Operating income (Loss)		(874)
Other (expense) income
Interest and Other Income		8
Interest Expense		(157)
Income (Loss) from Equity Method Investments		(257)
Income (Loss) from Subsidiaries, before Tax		0
Other nonoperating income (expense), excluding interest income		0
Nonoperating Income (Expense)		(406)
Loss (income) before income taxes		(1,280)
Income tax benefit (expense)		(55)
Net income (loss)		(1,335)
Other Comprehensive Income (Loss), Net of Tax		15
Comprehensive (loss) income		(1,320)
Predecessor [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Revenues		0
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)		0
Selling, general and administrative		0
Severance, exit costs and asset impairments		0
Depreciation		0
Amortization		0
Total costs and expenses		0
Operating income (Loss)		0
Other (expense) income
Interest and Other Income		(20)
Interest Expense		20
Income (Loss) from Equity Method Investments		0
Income (Loss) from Subsidiaries, before Tax		1,335
Other nonoperating income (expense), excluding interest income		0
Nonoperating Income (Expense)		1,335
Loss (income) before income taxes		1,335
Income tax benefit (expense)		0
Net income (loss)		1,335
Other Comprehensive Income (Loss), Net of Tax		(15)
Comprehensive (loss) income		$ 1,320