Stockholders' Equity - Stock Repurchase Program (Narrative) (Details) $ in Millions	3 Months Ended	136 Months Ended
	Mar. 31, 2024 USD ($) shares	Mar. 31, 2024 USD ($) shares
Class of Stock [Line Items]
Stock repurchased during period (in shares) | shares	0	3,731,000,000
Stock repurchased during period		$ 16,834
Remaining amount authorized under the stock repurchase program	$ 1,166	1,166
Common Stock
Class of Stock [Line Items]
Stock repurchase program, aggregate authorized amount	$ 18,000	$ 18,000