Stock Repurchases (Narrative) (Details) (USD $)	0 Months Ended	6 Months Ended
Jan. 25, 2012	Sep. 28, 2012
Stock Repurchases [Abstract]
Authorization to repurchase common stock	$ 1,000,000,000
Stock repurchase program, remaining authorized repurchase amount		$ 483,000,000

The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration