Subsequent Events (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Oct. 31, 2023	Sep. 30, 2023
Severance | Global Workforce Reduction
Subsequent Event [Line Items]
Accrual			$ 0
Subsequent Event | Group Of Creditors
Subsequent Event [Line Items]
Outstanding obligations under the plan		$ 7,000
Subsequent Event | Financing Through Issuance Of New Long-Term Debt | Group Of Creditors
Subsequent Event [Line Items]
Commitment		1,200
Subsequent Event | Severance | Global Workforce Reduction | Minimum
Subsequent Event [Line Items]
Expected cost to be incurred		17
Subsequent Event | Severance | Global Workforce Reduction | Maximum
Subsequent Event [Line Items]
Expected cost to be incurred		$ 27
Subsequent Event | Forecast
Subsequent Event [Line Items]
Distributions	$ 50