Accumulated Other Comprehensive Loss - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassifications out of accumulated other comprehensive income loss by component
Interest expense	$ 294	$ 337	$ 573	$ 689
Other income (expense), net	(16)	122	24	52
Total before tax	8,690	(453)	8,010	(1,254)
Income tax expense	46	109	215	311
Net (loss) income	8,736	(344)	8,225	(943)
Decrease (Increase) in Net Income | Interest rate swaps
Reclassifications out of accumulated other comprehensive income loss by component
Interest expense		0		22
Income tax expense		0		(5)
Net (loss) income		0		17
Decrease (Increase) in Net Income | Net actuarial loss
Reclassifications out of accumulated other comprehensive income loss by component
Other income (expense), net	21	30	41	67
Decrease (Increase) in Net Income | Prior service cost
Reclassifications out of accumulated other comprehensive income loss by component
Other income (expense), net	(3)	0	(7)	(1)
Decrease (Increase) in Net Income | Defined benefit plan
Reclassifications out of accumulated other comprehensive income loss by component
Total before tax	18	30	34	66
Income tax expense	(4)	(8)	(8)	(17)
Net (loss) income	$ 14	$ 22	$ 26	$ 49