Stockholders' Equity (Tables)

12 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Schedule of shares repurchased over last three years

Information regarding the share repurchase activity over the last three years is as follows:



	Share Repurchases ⁽¹⁾
(In millions, except price per share data)		Total Number of Shares Purchased ^{(2) (4)}	Average Price Paid Per Share			Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Balance, March 31, 2015						$	—
Shares repurchase plans authorized
May 2015						500
October 2015						2,000
Shares repurchased		8.7	$	173.64		(1,504		)
Balance, March 31, 2016						$	996
Shares repurchase plans authorized
October 2016						4,000
Shares repurchased		15.5	$	141.16		(2,250		)
Balance, March 31, 2017						$	2,746
Shares repurchased		10.5	$	151.06	⁽³⁾	(1,650		)
Balance, March 31, 2018						$	1,096


(1)	This table does not include shares tendered to satisfy the exercise price in connection with cashless exercises of employee stock options or shares tendered to satisfy tax withholding obligations in connection with employee equity awards.


(2)	All of the shares purchased were part of the publicly announced programs.


(3)	The average price paid per share computation includes the initial share settlement of 2.5 million shares from the March 2018 ASR program, of which the actual average price of shares will be determined at the termination of the program.


(4)	The number of shares purchased reflects rounding adjustments.

Schedule of comprehensive income (loss)

Information regarding other comprehensive income (loss) including noncontrolling interests and redeemable noncontrolling interests, net of tax, by component is as follows:



	Years Ended March 31,
(In millions)	2018			2017			2016
Foreign currency translation adjustments:⁽¹⁾
Foreign currency translation adjustments arising during period, net of income tax expense (benefit) of nil, ($1) and ($23) ^{(2) (3)}	$	804		$	(644	)	$	113
Reclassified to income statement, net of income tax expense of nil, nil and nil ⁽⁴⁾	—			20			—
	804			(624		)	113
Unrealized gains (losses) on net investment hedges ⁽⁵⁾
Unrealized gains (losses) on net investment hedges arising during period, net of income tax benefit of $95, $5 and nil	(180		)	(8		)	—
Reclassified to income statement, net of income tax expense of nil, nil and nil	—			—			—
	(180		)	(8		)	—
Unrealized gains (losses) on cash flow hedges:
Unrealized gains (losses) on cash flow hedges arising during period, net of income tax benefit of $9, nil and nil	(30		)	(19		)	6
Reclassified to income statement, net of income tax expense of nil, nil and nil	—			—			3
	(30		)	(19		)	9
Changes in retirement-related benefit plans:
Net actuarial gain (loss) and prior service credit (cost) arising during period, net of income tax expense (benefit) of $2, $4 and $13 ⁽⁶⁾	25			(20		)	23
Amortization of actuarial gain (loss), prior service cost and transition obligation, net of income tax expense (benefit) of $2, $4 and $18 ⁽⁷⁾	5			9			30
Foreign currency translation adjustments and other, net of income tax expense of nil, nil and nil	(15		)	3			(3		)
Reclassified to income statement, net of income tax expense of nil, nil and nil	—			—			—
	15			(8		)	50

Other Comprehensive Income (Loss), net of tax	$	609		$	(659	)	$	172


(1)	Foreign currency translation adjustments primarily result from the conversion of non-U.S. dollar financial statements of our foreign subsidiaries into the Company’s reporting currency, U.S. dollars.

(2)

The 2018 net foreign currency translation gains of $804 million were primarily due to the strengthening of the Euro, British pound sterling and Canadian dollar against the U.S. dollar from April 1, 2017 to March 31, 2018. The 2017 net foreign currency translation losses of $644 million were primarily due to the weakening of the Euro and British pound sterling against the U.S. dollar from April 1, 2016 to March 31, 2017.


(3)	2018 includes net foreign currency translation gains of $189 million and 2017 includes net foreign currency translation losses of $74 million attributable to noncontrolling and redeemable noncontrolling interests.


(4)	These net foreign currency losses were reclassified from accumulated other comprehensive income (loss) to discontinued operations within our consolidated statement of operations due to the sale of our Brazilian pharmaceutical distribution business.


(5)	2018 and 2017 include foreign currency losses of $268 million and $13 million on the net investment hedges from the Euro and British pound sterling-denominated notes.


(6)	The net actuarial losses of $4 million and $5 million were attributable to noncontrolling and redeemable noncontrolling interests in 2018 and 2017.


(7)	Pre-tax amount was reclassified into cost of sales and operating expenses in the consolidated statements of operations. The related tax expense was reclassified into income tax expense in the consolidated statements of operations.

Schedule of accumulated other comprehensive income (loss)

Information regarding changes in our accumulated other comprehensive income (loss) by component are as follows:



	Foreign Currency Translation Adjustments
(In millions)	Foreign Currency Translation Adjustments, Net of Tax			Unrealized Losses on Net Investment Hedges, Net of Tax			Unrealized Gains (Losses) on Cash Flow Hedges, Net of Tax			Unrealized Net Gains (Losses) and Other Components of Benefit Plans, Net of Tax			Total Accumulated Other Comprehensive Income (Loss)
Balance at March 31, 2016	$	(1,323	)	$	—		$	(12	)	$	(226	)	$	(1,561	)
Other comprehensive income (loss) before reclassifications	(644		)	(8		)	(19		)	(17		)	(688		)
Amounts reclassified to earnings	20			—			—			9			29
Other comprehensive income (loss)	$	(624	)	$	(8	)	$	(19	)	$	(8	)	$	(659	)
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests	(74		)	—			—			(5		)	(79		)
Other comprehensive income (loss) attributable to McKesson	$	(550	)	$	(8	)	$	(19	)	$	(3	)	$	(580	)
Balance at March 31, 2017	$	(1,873	)	$	(8	)	$	(31	)	$	(229	)	$	(2,141	)
Other comprehensive income (loss) before reclassifications	804			(180		)	(30		)	10			604
Amounts reclassified to earnings and other	—			—			—			5			5
Other comprehensive income (loss)	$	804		$	(180	)	$	(30	)	$	15		$	609
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests	189			—			—			(4		)	185
Other comprehensive income (loss) attributable to McKesson	$	615		$	(180	)	$	(30	)	$	19		$	424
Balance at March 31, 2018	$	(1,258	)	$	(188	)	$	(61	)	$	(210	)	$	(1,717	)