Other Comprehensive Income (Loss) - Changes in AOCI Balance by Components (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Comprehensive Income (Loss):
(Loss) Income Before Reclassifications		$ (41)	$ 158	$ 53
Amounts Reclassified to Net Earnings		46	81	52
Tax Expense		15	(49)	(28)
Total Other Comprehensive Income (Loss) (Note 16)		20	190	77
Pension and Other Post-Employment Benefits
Other Comprehensive Income (Loss):
Beginning Balance		(431)	(598)	(619)
(Loss) Income Before Reclassifications		(129)	147	(17)
Amounts Reclassified to Net Earnings		44	66	47
Tax Expense		19	(46)	(9)
Total Other Comprehensive Income (Loss) (Note 16)		(66)	167	21
Ending Balance		(497)	(431)	(598)
Interest Rate Derivatives
Other Comprehensive Income (Loss):
Beginning Balance		70	62	0
(Loss) Income Before Reclassifications		88	11	80
Amounts Reclassified to Net Earnings		0	0	0
Tax Expense		(8)	(3)	(18)
Total Other Comprehensive Income (Loss) (Note 16)		80	8	62
Ending Balance		150	70	62
Other
Other Comprehensive Income (Loss):
Beginning Balance		(47)	(62)	(56)
(Loss) Income Before Reclassifications		0	0	(10)
Amounts Reclassified to Net Earnings		2	15	5
Tax Expense		4	0	(1)
Total Other Comprehensive Income (Loss) (Note 16)		6	15	(6)
Ending Balance		(41)	(47)	(62)
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss):
Beginning Balance		(408)	(598)	(675)
Total Other Comprehensive Income (Loss) (Note 16)	[1]	20	190	77
Ending Balance		$ (388)	$ (408)	$ (598)

[1] Accumulated Other Comprehensive Loss year-end balances shown above are net of tax. The associated taxes were $122 million, $107 million and $156 million for 2022, 2021 and 2020, respectively. For additional information see Note 16, Other Comprehensive Income.