Income Taxes (Tables)

9 Months Ended

Jan. 27, 2017

Income Tax Disclosure [Abstract]

Effective Tax Rates

Our effective tax rates for the periods presented were as follows:

	Nine Months Ended
	January 27, 2017			January 29, 2016
Effective tax rates		23.5	%		16.8	%

Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):

	Nine Months Ended
	January 27, 2017			January 29, 2016
Balance at beginning of period	$	216		$	272
Additions based on tax positions related to the current year		5			13
Additions for tax positions of prior years		6			21
Decreases for tax positions of prior years		—			(38	)
Settlements		(12	)		(52	)
Balance at end of period	$	215		$	216