Weighted Average Common Shares - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Shares granted, restricted stock (in shares)		565,318	705,489
Shares granted, performance share units (in shares)		178,008	205,155
Shares granted, stock options (in shares)		269,748	319,295
Authorized common stock repurchase amount	$ 7,500	$ 7,500
Remaining authorized common stock repurchase amount	650	650
Common stock acquired and retired	$ 190	$ 190	$ 0
Number of common stock acquired and retired	1,800,000	1,800,000