Derivative Financial Instruments and Hedging Activities (Tables)

3 Months Ended

Jul. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments, Gain (Loss) [Table Text Block]

The following tables present the pre-tax impact that changes in the fair value of our derivative instruments and non-derivative hedging instruments had on AOCI and earnings:

		Three Months Ended
		July 31,
(Dollars in millions)	Classification	2017			2018
Derivative Instruments
Currency derivatives designated as cash flow hedges:
Net gain (loss) recognized in AOCI	n/a	$	(36	)	$	27
Net gain (loss) reclassified from AOCI into earnings	Sales	2			(2		)
Currency derivatives not designated as hedging instruments:
Net gain (loss) recognized in earnings	Sales	(3		)	3
Net gain (loss) recognized in earnings	Other income	9			3
Non-Derivative Hedging Instruments
Foreign currency-denominated debt designated as net investment hedge:
Net gain (loss) recognized in AOCI	n/a	(16		)	28
Foreign currency-denominated debt not designated as hedging instrument:
Net gain (loss) recognized in earnings	Other income	(16		)	4

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The following table presents the fair values of our derivative instruments:

(Dollars in millions)	Classification	Fair value of derivatives in a gain position		Fair value of derivatives in a loss position
April 30, 2018
Designated as cash flow hedges:
Currency derivatives	Other current assets	$	2	$	(2	)
Currency derivatives	Other assets	1		—
Currency derivatives	Accrued expenses	4		(23		)
Currency derivatives	Other liabilities	2		(18		)
Not designated as hedges:
Currency derivatives	Other current assets	—		—
Currency derivatives	Accrued expenses	1		(5		)
July 31, 2018
Designated as cash flow hedges:
Currency derivatives	Other current assets	5		(3		)
Currency derivatives	Other assets	7		(5		)
Currency derivatives	Accrued expenses	4		(9		)
Currency derivatives	Other liabilities	1		(2		)
Not designated as hedges:
Currency derivatives	Other current assets	1		—
Currency derivatives	Accrued expenses	—		(1		)

Offsetting Derivative Assets and Liabilities [Table Text Block]

The following table summarizes the gross and net amounts of our derivative contracts:

(Dollars in millions)	Gross Amounts of Recognized Assets (Liabilities)			Gross Amounts Offset in Balance Sheet			Net Amounts Presented in Balance Sheet			Gross Amounts Not Offset in Balance Sheet			Net Amounts
April 30, 2018
Derivative assets	$	10		$	(9	)	$	1		$	(1	)	$	—
Derivative liabilities	(48		)	9			(39		)	1			(38		)
July 31, 2018
Derivative assets	18			(13		)	5			(1		)	4
Derivative liabilities	(20		)	13			(7		)	1			(6		)