Shareholders' Equity (Tables)

6 Months Ended

Mar. 31, 2022

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Loss

The components of AOCL and the changes in AOCL by components, net of tax, for the three months ended March 31, 2022 and 2021 are as follows (in millions):

	Foreign Currency Translation		Employee Benefit Related Adjustments		Unrealized Income (Loss) on cash flow hedges		Total
Balance at December 31, 2021	$	(119)	$	(525)	$	—	$	(644)
Other comprehensive income (loss) before reclassification	15		2		(1)		16
Amounts reclassified from accumulated other comprehensive loss	—		—		—		—
Net current-period other comprehensive income (loss)	15		2		(1)		16
Balance at March 31, 2022	$	(104)	$	(523)	$	(1)	$	(628)

    

	Foreign Currency Translation		Employee Benefit Related Adjustments		Unrealized Income (Loss) on cash flow hedges		Total
Balance at December 31, 2020	$	(74)	$	(480)	$	(1)	$	(555)
Other comprehensive loss before reclassification	(22)		—		—		(22)
Amounts reclassified from accumulated other comprehensive loss	—		2		—		2
Net current-period other comprehensive income (loss)	(22)		2		—		(20)
Balance at March 31, 2021	$	(96)	$	(478)	$	(1)	$	(575)

The components of AOCL and the changes in AOCL by components, net of tax, for the six months ended March 31, 2022 and 2021 are as follows (in millions):

	Foreign Currency Translation		Employee Benefit Related Adjustments		Unrealized Income (Loss) on cash flow hedges		Total
Balance at September 30, 2021	$	(105)	$	(526)	$	(1)	$	(632)
Other comprehensive income before reclassification	1		1		—		2
Amounts reclassified from accumulated other comprehensive loss	—		2		—		2
Net current-period other comprehensive income	1		3		—		4
Balance at March 31, 2022	$	(104)	$	(523)	$	(1)	$	(628)

	Foreign Currency Translation		Employee Benefit Related Adjustments		Unrealized Income (Loss) on cash flow hedges		Total
Balance at September 30, 2020	$	(129)	$	(483)	$	(2)	$	(614)
Other comprehensive income before reclassification	33		1		1		35
Amounts reclassified from accumulated other comprehensive loss	—		4		—		4
Net current-period other comprehensive income	33		5		1		39
Balance at March 31, 2021	$	(96)	$	(478)	$	(1)	$	(575)

Schedule of Reclassification Out of Accumulated Other Comprehensive Income

Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income		Affected Line Item in the Consolidated Statement of Operations
Employee Benefit Related Adjustment
Prior service benefit	$	(9)	(a)
Actuarial losses	9		(a)
	—		Total before tax
	—		Tax benefit
Total reclassifications for the period	$	—	Net of tax

(a) These accumulated other comprehensive income components are included in the computation of net periodic pension and retiree medical expense (see Note 15 for additional details), which is recorded in other income (expense), net.

Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income		Affected Line Item in the Consolidated Statement of Operations
Employee Benefit Related Adjustment
Prior service benefit	$	(9)	(b)
Actuarial losses	11		(b)
	2		Total before tax
	—		Tax benefit
Total reclassifications for the period	$	2	Net of tax

(b) These accumulated other comprehensive income components are included in the computation of net periodic pension and retiree medical expense (see Note 15 for additional details), which is recorded in other income (expense), net.

Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income		Affected Line Item in the Consolidated Statement of Operations
Employee Benefit Related Adjustment
Prior service benefit	$	(17)	(a)
Actuarial losses	19		(a)
	2		Total before tax
	—		Tax benefit
Total reclassifications for the period	$	2	Net of tax

(a) These accumulated other comprehensive income components are included in the computation of net periodic pension and retiree medical expense (see Note 15 for additional details), which is recorded in other income (expense), net.

Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from Accumulated Other Comprehensive Income		Affected Line Item in the Consolidated Statement of Operations
Employee Benefit Related Adjustment
Prior service benefit	$	(18)	(b)
Actuarial losses	22		(b)
	4		Total before tax
	—		Tax benefit
Total reclassifications for the period	$	4	Net of tax

(b) These accumulated other comprehensive income components are included in the computation of net periodic pension and retiree medical expense (see Note 15 for additional details), which is recorded in other income (expense), net.