Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2022	Mar. 31, 2021
Income Tax Contingency [Line Items]
Income tax provision (benefit)	$ 24		$ 28		$ 45	$ 80
Effective tax rate	67.00%		23.00%		100.00%	23.00%
Unrecognized tax benefits	$ 486				$ 486
Unrecognized tax benefits that would impact effective tax rate	129				129
Net accrued interest	21				21
Interest and penalties accrued	2				4
Gain (loss) on sale of investment					$ (8)	$ 33
SJA
Income Tax Contingency [Line Items]
Gain (loss) on sale of investment			$ 33			$ 33
Tax on gain on disposal of equity method investment			$ 5
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil
Income Tax Contingency [Line Items]
Income tax provision (benefit)				$ 3
Indirect foreign tax credit		$ 3
Retrospective recoveries of Brazil indirect tax credits				$ 8
Foreign Tax Authority | State Administration of Taxation, China
Income Tax Contingency [Line Items]
Tax benefit from temporary indirect tax rate reduction	$ 4