Shareholders' Equity - Shares Repurchased and Reissued (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jul. 24, 2023	Jan. 31, 2022
Equity, Class of Treasury Stock [Line Items]
Repurchase of common shares	$ 568	$ 509	$ 1,727	$ 1,565
Stock repurchase program, authorized amount					$ 3,500	$ 3,000
Remaining balance under stock repurchase program	$ 3,600		$ 3,600
Reissuance of treasury stock (in shares)			0.6	0.7
Common Stock Repurchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of common shares (in shares)			4.7	5.0
Repurchase of common shares			$ 1,500	$ 1,400
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	$ 99
Option Repurchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of common shares (in shares)			0.3	0.3
Repurchase of common shares			$ 109	$ 87