Income Taxes	6 Months Ended
	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesFor the three months ended March 31, 2022 and 2021, the company recognized tax expense of $15 million and $22 million, respectively. This resulted in effective tax rates of 19% and 25%, respectively. For the six months ended March 31, 2022 and 2021, the company recognized tax expense of $27 million and $29 million, respectively. This resulted in effective tax rates of 18% and 23%, respectively.