AOCL (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (1,513)	$ (1,666)	$ (1,513)	$ (1,666)		$ (1,551)
Other Comprehensive Income (Loss), Net of Tax	(21)	(20)	(38)	(104)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(53)	(55)	(53)	(55)	$ (55)	(53)	$ (55)	$ (55)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	2	0	0	0
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(1,460)	(1,611)	(1,460)	(1,611)	$ (1,479)	$ (1,498)	$ (1,631)	$ (1,715)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	0	67
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0	0	0	87
Other Comprehensive Income (Loss) before Reclassifications, Tax	0	0	0	(20)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	24	27	49	49
Reclassification from AOCI, Current Period, Tax	(5)	(7)	(11)	(12)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	19	20	38	37
Other Comprehensive Income (Loss), Net of Tax	$ 19	$ 20	$ 38	$ 104