Changes in Accumulated Other Comprehensive Income - Schedule of Changes in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 11,614	$ 14,676	$ 15,830
Separation-related adjustments	(197)
Other comprehensive income (loss), net of income taxes	277	(1)	2
Ending Balance	11,372	11,614	14,676
Losses on Cash Flow Hedges
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(8)	(7)	(5)
Separation-related adjustments	0
OCI before reclassifications	(1)	(1)	(2)
Amounts reclassified from AOCI	0
Other comprehensive income (loss), net of income taxes	(1)	(1)	(2)
Ending Balance	(9)	(8)	(7)
Pension and non-pension postretirement benefit plans valuation adjustment(a)
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	0	0	0
Separation-related adjustments	(2,006)
OCI before reclassifications	186	0	0
Amounts reclassified from AOCI	95
Other comprehensive income (loss), net of income taxes	(1,725)	0	0
Ending Balance	(1,725)	0	0
Foreign Currency Items
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(23)	(23)	(27)
Separation-related adjustments	0
OCI before reclassifications	(3)	0	4
Amounts reclassified from AOCI	0
Other comprehensive income (loss), net of income taxes	(3)	0	4
Ending Balance	(26)	(23)	(23)
Total
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(31)	(30)	(32)
Separation-related adjustments	(2,006)
OCI before reclassifications	182	(1)	2
Amounts reclassified from AOCI	95
Other comprehensive income (loss), net of income taxes	(1,729)	(1)	2
Ending Balance	$ (1,760)	$ (31)	$ (30)