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Pension and Other Postretirement Benefits (Details 5) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Employer contribution	$ 25	$ 22	$ 20
Nonqualified supplemental pension plan
Pension and Other Postretirement Benefits
Accrued expenses	1	4
Other noncurrent liability	14	16
Expenses recognized	$ 2	$ 2	$ 1

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