Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

A summary of the Company’s RSU activity and related information for the six months ended March 31, 2018 is as follows:



	Number of RSUs (in thousands)		Weighted-Average Grant Date Fair Value Per RSU		Aggregate Fair Value (in millions)
Balance as of September 30, 2017	97,571		$	110.33
RSUs granted	40,184		$	159.25
RSUs vested	(22,348	)	$	103.66
RSUs canceled	(3,023	)	$	123.28
Balance as of March 31, 2018	112,384		$	128.80	$	18,856

Summary of Share-Based Compensation Expense

The following table shows a summary of the share-based compensation expense included in the Condensed Consolidated Statements of Operations for the three- and six-month periods ended March 31, 2018 and April 1, 2017 (in millions):



	Three Months Ended				Six Months Ended
	March 31, 2018		April 1, 2017		March 31, 2018		April 1, 2017
Cost of sales	$	257	$	217	$	509	$	446
Research and development	666		575		1,312		1,164
Selling, general and administrative	425		425		823		863
Total share-based compensation expense	$	1,348	$	1,217	$	2,644	$	2,473