Supplemental Cash Flow Information (Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Additions to property, plant and equipment per the consolidated statements of cash flows		$ 457	$ 495
Increase (decrease) in capital accruals		26	(34)
Capital expenditures	[1]	$ 483	$ 461

[1] Includes changes in capital expenditure accruals. See Note 19 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the three months ended March 31, 2023 and 2022 as reported in the consolidated statements of cash flows.