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Fair Value Measurements (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Jun. 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							$ 2,881	$ 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							2,964	3,465
Recurring basis
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents							2,160	1,507
Nonqualified employee benefit trusts							17	20
Derivative Liability							3	47
Embedded derivative liability							(15)	(15)
Derivative Asset							22	16
Recurring basis | Quoted Prices in Active Markets (Level 1)
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents							2,160	1,507
Nonqualified employee benefit trusts							17	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							3	47
Embedded derivative liability							(15)	(15)
Derivative Asset							22	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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