Reportable Segments and Revenue Recognition (Remaining Performance Obligation) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Revenue, remaining performance obligation, amount	$ 600	$ 155
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	600	$ 155
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01
Leases [Abstract]
Revenue, remaining performance obligation, amount	46
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 46
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Leases [Abstract]
Revenue, remaining performance obligation, amount	$ 124
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 124
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Leases [Abstract]
Revenue, remaining performance obligation, amount	$ 107
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 107
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year