AOCL (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (1,392)	$ (1,534)	$ (1,402)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(53)	(55)	(54)	$ (53)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	1	(2)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(1,339)	(1,479)	$ (1,348)	$ (1,498)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	12	25
Reclassification from AOCI, Current Period, Tax	(3)	(6)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 9	$ 19