Income Taxes (Tables)

3 Months Ended

Jul. 29, 2016

Income Tax Disclosure [Abstract]

Effective Tax Rates

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

	Three Months Ended
	July 29, 2016			July 31, 2015
Effective tax rates		30.4	%		(36.4	)%

Unrecognized Tax Benefits

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

	Three Months Ended
	July 29, 2016		July 31, 2015
Balance at beginning of period	$	216	$	272
Additions based on tax positions related to the current year		2		4
Additions for tax positions of prior years		—		19
Decreases for tax positions of prior years		—		(5	)
Settlements		—		(47	)
Balance at end of period	$	218	$	243