Stockholders' Equity (Tables)

9 Months Ended

Jan. 31, 2018

Stockholders' Equity Attributable to Parent [Abstract]

Schedule of Stockholders Equity [Table Text Block]

The following table summarizes the changes in stockholders’ equity during the nine months ended January 31, 2018:

(Dollars in millions)	Class A Common Stock		Class B Common Stock			Additional Paid-in Capital			Retained Earnings			AOCI			Treasury Stock			Total
Balance at April 30, 2017	$	25	$	43		$	65		$	4,470		$	(390	)	$	(2,843	)	$	1,370
Retirement of treasury stock			(10		)	(8		)	(2,684		)				2,702			—
Net income									607									607
Net other comprehensive income (loss)												8						8
Cash dividends									(773		)							(773		)
Acquisition of treasury stock															(1		)	(1		)
Stock-based compensation expense						14												14
Stock issued under compensation plans															26			26
Loss on issuance of treasury stock issued under compensation plans						(50		)										(50		)
Stock split	—		14			(14		)										—
Balance at January 31, 2018	$	25	$	47		$	7		$	1,620		$	(382	)	$	(116	)	$	1,201

Schedule of Stock by Class [Table Text Block]

The following table shows the effects of the treasury stock retirement and stock split (as if the additional shares issued thereunder were issued on January 31, 2018) on the number of issued common shares:

	Issued Common Shares
(Shares in thousands)	Class A	Class B		Total
Balance at April 30, 2017	170,000	284,627		454,627
Retirement of treasury stock	—	(67,000	)	(67,000	)
Stock split	—	96,905		96,905
Balance at January 31, 2018	170,000	314,532		484,532

Dividends Declared [Table Text Block]

The following table summarizes the cash dividends declared per share on our Class A and Class B common stock during the nine months ended January 31, 2018:

Declaration Date	Record Date	Payable Date	Amount per Share
May 24, 2017	June 5, 2017	July 3, 2017	$0.1460
July 27, 2017	September 7, 2017	October 2, 2017	$0.1460
November 16, 2017	December 7, 2017	January 2, 2018	$0.1580
January 23, 2018	March 5, 2018	April 2, 2018	$0.1580
January 23, 2018	April 2, 2018	April 23, 2018	$1.0000

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table summarizes the changes in each component of AOCI, net of tax, during the nine months ended January 31, 2018:

(Dollars in millions)	Currency Translation Adjustments			Cash Flow Hedge Adjustments			Postretirement Benefits Adjustments			Total AOCI
Balance at April 30, 2017	$	(204	)	$	11		$	(197	)	$	(390	)
Net other comprehensive income (loss)	47			(48		)	9			8
Balance at January 31, 2018	$	(157	)	$	(37	)	$	(188	)	$	(382	)