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Fair Value Measurements (Details 2) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2022	Dec. 31, 2021
Assets and liabilities measured at fair value on a recurring basis
Payments for Strategic Venture Compliance	$ 5	$ 5	$ 5	$ 5	$ 5	$ 5
Estimate of Fair Value Measurement
Assets and liabilities measured at fair value on a recurring basis
Fair value of long-term debt, including current portion							$ 2,643	$ 4,113
Reported Value Measurement
Assets and liabilities measured at fair value on a recurring basis
Fair value of long-term debt, including current portion							2,965	3,465
Recurring basis
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents							2,035	1,507
Nonqualified employee benefit trusts							16	20
Derivative Liability							20	47
Embedded derivative liability							(15)	(15)
Derivative Asset							26	16
Recurring basis | Quoted Prices in Active Markets (Level 1)
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents							2,035	1,507
Nonqualified employee benefit trusts							16	20
Derivative Liability							0	0
Embedded derivative liability							0	0
Derivative Asset							0	0
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents							0	0
Nonqualified employee benefit trusts							0	0
Derivative Liability							20	47
Embedded derivative liability							(15)	(15)
Derivative Asset							26	16
Recurring basis | Fair Value, Inputs (Level 3)
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents							0	0
Nonqualified employee benefit trusts							0	0
Derivative Liability							0	0
Embedded derivative liability							0	0
Derivative Asset							$ 0	$ 0

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