Fair Value Measurements (Tables)

12 Months Ended

Sep. 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 September 27, 2015 (in millions):

	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	2,043	$	5,055	$	—	$	7,098
Marketable securities
U.S. Treasury securities and government-related securities	41		818		—		859
Corporate bonds and notes	—		15,402		—		15,402
Mortgage- and asset-backed and auction rate securities	—		1,583		224		1,807
Equity and preferred securities and equity funds	1,168		462		—		1,630
Debt funds	—		3,689		—		3,689
Total marketable securities	1,209		21,954		224		23,387
Derivative instruments	1		39		—		40
Other investments	290		—		—		290
Total assets measured at fair value	$	3,543	$	27,048	$	224	$	30,815
Liabilities
Derivative instruments	$	—	$	6	$	—	$	6
Other liabilities	289		—		—		289
Total liabilities measured at fair value	$	289	$	6	$	—	$	295

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):

	2015			2014
Beginning balance of Level 3	$	269		$	322
Total realized and unrealized gains or losses:
Included in investment income, net	3			11
Included in other comprehensive income (loss)	(4		)	(3		)
Purchases	69			107
Sales	(46		)	(126		)
Settlements	(64		)	(40		)
Transfers out of Level 3	(3		)	(2		)
Ending balance of Level 3	$	224		$	269