Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Diluted earnings (loss) per share of common stock	$ 1.00	$ 1.33	$ 1.83	$ 2.11
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	5,000,000	5,000,000	10,000,000	9,000,000
Interest Cost	173,000,000	109,000,000	347,000,000	217,000,000
Expected return on plan assets	(151,000,000)	(190,000,000)	(303,000,000)	(380,000,000)
Amortization of unrecognized loss (gain)	0	1,000,000	0	2,000,000
Amortization of Prior Service Benefit	(1,000,000)	(1,000,000)	(2,000,000)	(2,000,000)
Settlement Loss (Gain)	0	2,000,000	0	2,000,000
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	26,000,000	(74,000,000)	52,000,000	(152,000,000)
Other Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0	1,000,000	0	1,000,000
Interest Cost	12,000,000	6,000,000	24,000,000	13,000,000
Amortization of unrecognized loss (gain)	(3,000,000)	1,000,000	(5,000,000)	1,000,000
Amortization of Prior Service Benefit	0	(1,000,000)	0	(1,000,000)
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	$ 9,000,000	$ 7,000,000	$ 19,000,000	$ 14,000,000