Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Net income tax payments/(refunds)	$ 187	$ 204	$ (1,317)
Deferred tax assets	17,991	14,743
Deferred tax liabilities	10,091	10,363
Valuation allowance	7,837	4,550
Valuation allowance, deferred tax asset, increase (decrease), amount	3,287
Unrecognized tax benefits that would affect the effective tax rate, if recognized	$ 651	$ 1,088	$ 878