Derivative Financial Instruments (Tables)

6 Months Ended

Oct. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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

		Three Months Ended
		October 31,
(Dollars in millions)	Classification	2014			2015
Currency derivatives designated as cash flow hedges:
Net gain (loss) recognized in AOCI	n/a	$	42		$	9
Net gain (loss) reclassified from AOCI into income	Net sales	6			17
Derivatives not designated as hedging instruments:
Currency derivatives – net gain (loss) recognized in income	Net sales	11			—
Currency derivatives – net gain (loss) recognized in income	Other income	3			—
		Six Months Ended
		October 31,
(Dollars in millions)	Classification	2014			2015
Currency derivatives designated as cash flow hedges:
Net gain (loss) recognized in AOCI	n/a	$	47		$	38
Net gain (loss) reclassified from AOCI into income	Net sales	4			30
Interest rate derivatives designated as cash flow hedges:
Net gain (loss) recognized in AOCI	n/a	—			8
Derivatives not designated as hedging instruments:
Currency derivatives – net gain (loss) recognized in income	Net sales	8			3
Currency derivatives – net gain (loss) recognized in income	Other income	(6		)	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 as of April 30, 2015 and October 31, 2015.

(Dollars in millions)	Classification	Fair value of derivatives in a gain position		Fair value of derivatives in a loss position
April 30, 2015:
Designated as cash flow hedges:
Currency derivatives	Other current assets	$	42	$	(2	)
Currency derivatives	Other assets	20		(3		)
Currency derivatives	Accrued expenses	—		(6		)
Currency derivatives	Other liabilities	—		(6		)
Not designated as hedges:
Currency derivatives	Other current assets	3		(1		)
Currency derivatives	Accrued expenses	1		(7		)
October 31, 2015:
Designated as cash flow hedges:
Currency derivatives	Other current assets	44		—
Currency derivatives	Other assets	20		(1		)
Currency derivatives	Accrued expenses	—		(3		)
Currency derivatives	Other liabilities	1		(2		)
Not designated as hedges:
Currency derivatives	Other current assets	6		(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, 2015:
Derivative assets	$	65		$	(6	)	$	59		$	—	$	59
Derivative liabilities	(24		)	6			(18		)	—		(18		)
October 31, 2015:
Derivative assets	70			(2		)	68			—		68
Derivative liabilities	(6		)	2			(4		)	—		(4		)