Segment and Related Information - Schedule of Segment Reporting Information to Consolidated Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Assets By Segment [Line Items]
Consolidated assets	$ 15,025	$ 14,860
Cash and cash equivalents	1,814	1,607
Corporate fixed assets, net	6,623	7,190
Corporate goodwill	144	145
Deferred income taxes	319
Pension assets	164
Operating Segments [Member]
Schedule Of Assets By Segment [Line Items]
Consolidated assets	12,066	12,015
Intersegment Eliminations [Member]
Schedule Of Assets By Segment [Line Items]
Elimination of intersegment receivables	(261)	(193)
Other [Member]
Schedule Of Assets By Segment [Line Items]
Cash and cash equivalents	1,814	1,607
Corporate fixed assets, net	374	453
Corporate goodwill	140	141
Deferred income taxes	506	655
Other	$ 222	$ 182