Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	15 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Income Tax [Line Items]
Payroll tax deferral from CARES Act through December 2020			$ 73
Income taxes	$ 111	$ 94
Effective income tax rate	20.00%	22.00%
Favorable discrete items, percentage impact	2.00%	1.00%

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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