Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Apr. 30, 2019

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

Schedule II – Valuation and Qualifying Accounts

For the Years Ended April 30, 2017, 2018, and 2019

(Expressed in millions)

Col. A	Col. B		Col. C(1)		Col. C(2)		Col. D			Col. E
Description	Balance at Beginning of Period		Additions Charged to Costs and Expenses		Additions Charged to Other Accounts		Deductions			Balance at End of Period
2017
Allowance for doubtful accounts	$	9	$	—	$	—	$	2	(1)	$	7
Deferred tax valuation allowance	$	25	$	5	$	2	$	2		$	30
2018
Allowance for doubtful accounts	$	7	$	—	$	—	$	—		$	7
Deferred tax valuation allowance	$	30	$	3	$	1	$	5		$	29
2019
Allowance for doubtful accounts	$	7	$	1	$	—	$	1	(1)	$	7
Deferred tax valuation allowance	$	29	$	1	$	1	$	6		$	25

⁽¹⁾  Doubtful accounts written off, net of recoveries.