Capital Stock - Share Repurchase Programs (Detail)	Dec. 31, 2021 USD ($)
Equity, Class of Treasury Stock [Line Items]
Remaining Authority	$ 1,081,000,000
February 9, 2021
Equity, Class of Treasury Stock [Line Items]
Amount Authorized	1,000,000,000
Remaining Authority	1,000,000,000
December 16, 2019
Equity, Class of Treasury Stock [Line Items]
Amount Authorized	1,000,000,000
Remaining Authority	$ 81,000,000