Stock Incentive Plans (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended						3 Months Ended	6 Months Ended	3 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014 number_of_plans	Sep. 27, 2013	Oct. 03, 2014 Cost of services	Sep. 27, 2013 Cost of services	Oct. 03, 2014 Cost of services	Sep. 27, 2013 Cost of services	Oct. 03, 2014 Selling, general and administrative	Sep. 27, 2013 Selling, general and administrative	Oct. 03, 2014 Selling, general and administrative	Sep. 27, 2013 Selling, general and administrative	Oct. 03, 2014 Stock options	Sep. 27, 2013 Stock options	Oct. 03, 2014 Stock options	Sep. 27, 2013 Stock options	Mar. 29, 2013 Stock options	Mar. 28, 2014 Stock options	Oct. 03, 2014 Stock Options and RSU's	Sep. 27, 2013 Stock Options and RSU's	Oct. 03, 2014 Other stock based incentives	Oct. 03, 2014 Restricted stock awards and other stock based incentives	Oct. 03, 2014 Nonemployee director incentives	Oct. 03, 2014 Restricted stock units	Dec. 27, 2013 SMI Employees Restricted stock units	Oct. 03, 2014 Nonemployee director incentives number_of_plans	Dec. 27, 2013 Fiscal 2015 Option Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense																								$ 2	$ 8		$ 7
Share-based Compensation	16	16	35	33	3	7	9	13	13	9	26	20
Share Based Compensation Net Of Tax	10	10	23	21
Grants in Period, Weighted Average Price Per Share													$ 18.34	$ 16.35
Risk Free Interest Rate															2.07%	2.08%
Expected Volatility Rate															33.00%	35.00%
Expected Dividend Rate															1.50%	1.67%
Tax Benefit Realized from Exercise of Options																			30	13
Excess tax benefit related to stock incentive plans															12	5
Number of incentive plans within the employee or nonemployee plan			2																							2
Number of common shares available for grant at period end	15,593,681		15,593,681																							175,300
Vesting period - minimum (in years)															3 years
Issue price of award (in dollars per share)																								$ 0
Number of Option Shares
Outstanding beginning of period (in shares)															9,829,611
Granted (in shares)															1,294,215
Exercised (in shares)															(2,952,668)
Canceled/Forfeited (in shares)			(13,000,000)												(643,192)
Expired (in shares)															(36,318)
Outstanding end of period (in shares)													7,491,648		7,491,648
Vested and expected to vest [Abstract]
Vested and expected to vest in the future as of period end (in shares)													7,279,846		7,279,846
Exercisable as of period end (in shares)													4,674,967		4,674,967
Weighted Average Exercise Price
Weighted average exercise price -beginning of period (in dollars per share)															$ 43.30
Weighted average exercise price - granted (in dollars per share)															$ 60.90
Weighted average exercise price - exercised (in dollars per share)															$ 44.37
Weighted average exercise price - cancelled/forfeited (in dollars per share)															$ 39.61
Weighted average exercise price - expired (in dollars per share)															$ 42.76
Weighted average exercise price - end of period (in dollars per share)													$ 46.24		$ 46.24
Weighted average exercise price vested and expected to vest as of period end (in dollars per share)													$ 45.97		$ 45.97
Weighted average exercise price exercisable as of period end (in dollars per share)													$ 44.83		$ 44.83
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual life (in years)															6 years 0 months 7 days		5 years 8 months 23 days
Weighted average remaining contractual life vested and expected to vest in the future as of period end (in years)															5 years 11 months 5 days
Weighted average remaining contractual life exercisable as of period end (in years)															4 years 3 months 18 days
Aggregate intrinsic value													99		99			167
Aggregate intrinsic value vested and expected to vest in the future as of period end													98		98
Aggregate intrinsic value exercisable as of period end													67		67
Aggregate disclosures [Abstract]
Total intrinsic value of options exercised during the period			53	19											53
Cash received from stock awards exercised during the period			125	85
Total unrecognized compensation expense related to unvested awards, net of expected forfeitures	$ 39		$ 39																			$ 116
Weighted average period over which cost is expected to be recognized (in years)			2 years 0 months 7 days																			2 years 2 months 1 day
Equity instruments other than options nonvested [Roll Forward]
Equity instruments other than options nonvested - beginning balance (in shares)																					3,187,741		184,146
Equity instruments other than options nonvested - granted (in shares)																					936,759		22,100
Equity instruments other than options nonvested - released/redeemed (in shares)																					(482,177)		(62,260)
Equity instruments other than options nonvested - canceled/forfeited (in shares)																					(476,183)		0
Equity instruments other than options nonvested - ending balance (in shares)																					3,166,140		143,986
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average fair value other than options - beginning balance (in dollars per share)																					$ 41.34		$ 42.07
Weighted average fair value other than options - granted (in dollars per share)																					$ 60.81		$ 59.63
Weighted average fair value other than options - released/redeemed (in dollars per share)																					$ 37.24		$ 44.10
Weighted average fair value other than options - canceled/forfeited (in dollars per share)																					$ 39.42		$ 0
Weighted average fair value other than options - ending balance (in dollars per share)																					$ 48.01		$ 43.88
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term															10 years