Stockholders' Equity (Deficit) (Tables)

6 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of information regarding changes in accumulated other comprehensive income (loss), net of tax, by component

Information regarding changes in the Company’s Accumulated other comprehensive income (loss), including noncontrolling interests and redeemable noncontrolling interests, by components for the three and six months ended September 30, 2021 and 2020 are as follows:

	Foreign Currency Translation Adjustments
(In millions)	Foreign Currency Translation Adjustments, Net of Tax (1)		Unrealized Gains (Losses) on Net Investment Hedges, Net of Tax			Unrealized Gains on Cash Flow Hedges, Net of Tax		Unrealized Net Gains (Losses) and Other Components of Benefit Plans, Net of Tax		Total Accumulated Other Comprehensive Loss
Balance at June 30, 2021	$	(1,477)	$	(57)		$	13	$	(106)	$	(1,627)
Other comprehensive income (loss) before reclassifications	(81)		32		⁽²⁾	3		1		(45)
Amounts reclassified to income statement	1		—			5		1		7
Other comprehensive income (loss)	(80)		32			8		2		(38)
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests	—		—			—		—		—
Other comprehensive income (loss) attributable to McKesson	(80)		32			8		2		(38)
Balance at September 30, 2021	$	(1,557)	$	(25)		$	21	$	(104)	$	(1,665)

(1)Primarily result from the conversion of non-U.S. dollar financial statements of the Company’s operations in Europe and Canada into the Company’s reporting currency, U.S. dollars.

(2)Amounts recorded in the three months ended September 30, 2021 include gains of $33 million related to net investment hedges from the Euro-denominated notes and gains of $10 million related to net investment hedges from cross-currency swaps. These amounts are net of income tax loss of $11 million.

	Foreign Currency Translation Adjustments
(In millions)	Foreign Currency Translation Adjustments, Net of Tax (1)		Unrealized Gains (Losses) on Net Investment Hedges, Net of Tax			Unrealized Gains on Cash Flow Hedges, Net of Tax		Unrealized Net Gains (Losses) and Other Components of Benefit Plans, Net of Tax		Total Accumulated Other Comprehensive Loss
Balance at March 31, 2021	$	(1,361)	$	(36)		$	13	$	(96)	$	(1,480)
Other comprehensive income (loss) before reclassifications	(47)		5		⁽²⁾	3		6		(33)
Amounts reclassified to income statement	18		—			5		(2)		21
Other comprehensive income (loss)	(29)		5			8		4		(12)
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests	9		(6)			—		—		3
Other comprehensive income (loss) attributable to McKesson	(38)		11			8		4		(15)
Exercise of put right by noncontrolling shareholders of McKesson Europe AG	(158)		—			—		(12)		(170)
Balance at September 30, 2021	$	(1,557)	$	(25)		$	21	$	(104)	$	(1,665)

(1)Primarily result from the conversion of non-U.S. dollar financial statements of the Company’s operations in Europe and Canada into the Company’s reporting currency, U.S. dollars.

(2)Amounts recorded in the six months ended September 30, 2021 include gains of $11 million related to net investment hedges from the Euro-denominated notes and gains of $5 million related to net investment hedges from cross-currency swaps. These amounts are net of income tax loss of $5 million.

	Foreign Currency Translation Adjustments
(In millions)	Foreign Currency Translation Adjustments, Net of Tax (1)		Unrealized Gains (Losses) on Net Investment Hedges, Net of Tax			Unrealized Gains (Losses) on Cash Flow Hedges, Net of Tax		Unrealized Net Losses and Other Components of Benefit Plans, Net of Tax		Total Accumulated Other Comprehensive Loss
Balance at June 30, 2020	$	(1,742)	$	75		$	44	$	(112)	$	(1,735)
Other comprehensive income (loss) before reclassifications	111		(70)		⁽²⁾	(19)		(9)		13
Amounts reclassified to income statement	—		—			—		—		—
Other comprehensive income (loss)	111		(70)			(19)		(9)		13
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests	(119)		(1)			—		(5)		(125)
Other comprehensive income (loss) attributable to McKesson	230		(69)			(19)		(4)		138
Balance at September 30, 2020	$	(1,512)	$	6		$	25	$	(116)	$	(1,597)

(1)Primarily result from the conversion of non-U.S. dollar financial statements of the Company’s operations in Europe and Canada into the Company’s reporting currency, U.S. dollars.

(2)Amounts recorded in the three months ended September 30, 2020 include losses of $83 million related to net investment hedges from the Euro-denominated notes and losses of $12 million related to net investment hedges from cross-currency swaps. These amounts are net of income tax benefit of $25 million.

	Foreign Currency Translation Adjustments
(In millions)	Foreign Currency Translation Adjustments, Net of Tax (1)		Unrealized Gains (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 Loss
Balance at March 31, 2020	$	(1,780)	$	138		$	49	$	(110)	$	(1,703)
Other comprehensive income (loss) before reclassifications	207		(133)		⁽²⁾	(24)		(10)		40
Amounts reclassified to income statement	—		—			—		2		2
Other comprehensive income (loss)	207		(133)			(24)		(8)		42
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests	(61)		(1)			—		(2)		(64)
Other comprehensive income (loss) attributable to McKesson	268		(132)			(24)		(6)		106
Balance at September 30, 2020	$	(1,512)	$	6		$	25	$	(116)	$	(1,597)

(1)Primarily result from the conversion of non-U.S. dollar financial statements of the Company’s operations in Europe and Canada into the Company’s reporting currency, U.S. dollars.

(2)Amounts recorded in the six months ended September 30, 2020 include losses of $117 million related to net investment hedges from the Euro-denominated notes and losses of $63 million related to net investment hedges from cross-currency swaps. These amounts are net of income tax benefit of $47 million.