Shareholders' Equity - Shares Repurchased and Reissued (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jul. 24, 2023
Equity, Class of Treasury Stock [Line Items]
Repurchase of common shares	$ 706	$ 657
Stock repurchase program, authorized amount			$ 3,500
Remaining balance under stock repurchase program	$ 2,600
Reissuance of treasury stock (in shares)	0.7	0.6
Common Stock Repurchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of common shares (in shares)	1.2	1.6
Repurchase of common shares	$ 507	$ 506
Restricted Stock Units Repurchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of common shares (in shares)	0.3	0.3
Repurchase of common shares	$ 99	$ 87
Option Repurchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of common shares (in shares)	0.2	0.2
Repurchase of common shares	$ 99	$ 63