Investigations and Out of Period Adjustments (Selected Items Impacting Consolidated Condensed Statements of Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenue	$ 3,781	$ 3,687	$ 11,434	$ 11,527
Costs of services (excludes depreciation and amortization)	2,995	3,186	9,141	9,730
Selling, general and administrative	278	272	864	838
Depreciation and amortization	270	301	806	868
Interest expense	57	42	147	129
Other expense (income), net	4	12	(1)	1
Income (loss) from continuing operations before taxes	155	(1,459)	380	(4,260)
Taxes on income	32	(38)	106	(78)
Income from continuing operations, net of tax	123	(1,421)	274	(4,182)
Income from discontinued operations, net of taxes	390	30	419	110
Net income (loss)	510	(1,390)	680	(4,084)
Continuing operations (in dollars per share)	$ 0.77	$ (9.15)	$ 1.67	$ (27.06)
Discontinued operations (in dollars per share)	$ 2.50	$ 0.19	$ 2.69	$ 0.71
Diluted EPS (in dollars per share)	$ 3.27	$ (8.96)	$ 4.36	$ (26.35)
Adjustment Increase/(Decrease) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenue	1	45	10	40
Costs of services (excludes depreciation and amortization)	2	(20)	12	(32)
Selling, general and administrative	1	4	(1)	2
Depreciation and amortization	(4)	7	(2)	(2)
Interest expense	(1)	0	0	(3)
Other expense (income), net	(1)	3	0	1
Income (loss) from continuing operations before taxes	2	51	(4)	74
Taxes on income	3	12	9	2
Income from continuing operations, net of tax	(1)	39	(13)	72
Income from discontinued operations, net of taxes		0		0
Net income (loss)	(1)	39	(13)	72
Continuing operations (in dollars per share)	$ (0.01)	$ 0.25	$ (0.08)	$ 0.46
Discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Diluted EPS (in dollars per share)	$ (0.01)	$ 0.25	$ (0.08)	$ 0.46
Amount Adjusted for Removal of Errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenue	3,782	3,732	11,444	11,567
Costs of services (excludes depreciation and amortization)	2,997	3,166	9,153	9,698
Selling, general and administrative	279	276	863	840
Depreciation and amortization	266	308	804	866
Interest expense	56	42	147	126
Other expense (income), net	3	15	(1)	2
Income (loss) from continuing operations before taxes	157	(1,408)	376	(4,186)
Taxes on income	35	(26)	115	(76)
Income from continuing operations, net of tax	122	(1,382)	261	(4,110)
Income from discontinued operations, net of taxes		30		110
Net income (loss)	$ 509	$ (1,351)	$ 667	$ (4,012)
Continuing operations (in dollars per share)	$ 0.76	$ (8.90)	$ 1.59	$ (26.60)
Discontinued operations (in dollars per share)	$ 2.50	$ 0.19	$ 2.69	$ 0.71
Diluted EPS (in dollars per share)	$ 3.26	$ (8.71)	$ 4.28	$ (25.89)