Fair Value Measurements (Tables)

3 Months Ended

Dec. 27, 2015

Notes to Financial Statements [Abstract]

Fair value hierarchy for assets and liabilities measured at fair value on a recurring basis

The following table presents the Company’s fair value hierarchy for assets and liabilities measured at fair value on a recurring basis at December 27, 2015 (in millions):

	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	2,364	$	3,847	$	—	$	6,211
Marketable securities
U.S. Treasury securities and government-related securities	89		914		—		1,003
Corporate bonds and notes	—		15,810		—		15,810
Mortgage- and asset-backed and auction rate securities	—		1,743		174		1,917
Equity and preferred securities and equity funds	1,119		376		—		1,495
Debt funds	—		3,453		—		3,453
Total marketable securities	1,208		22,296		174		23,678
Derivative instruments	—		18		—		18
Other investments	306		—		—		306
Total assets measured at fair value	$	3,878	$	26,161	$	174	$	30,213
Liabilities
Derivative instruments	$	—	$	6	$	—	$	6
Other liabilities	306		—		—		306
Total liabilities measured at fair value	$	306	$	6	$	—	$	312

Activity for marketable securities classified within Level 3 of the valuation hierarchy

The following table includes the activity for mortgage- and asset-backed and auction rate securities classified within Level 3 of the valuation hierarchy (in millions):

	Three Months Ended
	December 27, 2015			December 28, 2014
Beginning balance of Level 3	$	224		$	269
Total realized and unrealized gains or losses:
Included in other comprehensive income (loss)	(1		)	—
Purchases	—			29
Sales	(1		)	(24		)
Settlements	(36		)	(44		)
Transfers out of Level 3	(12		)	—
Ending balance of Level 3	$	174		$	230