Segments - Additional Information (Detail) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($) Segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment	3
Operating Income (Loss)	$ 434	$ 191
Europe [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	338	$ 502
Europe [Member] \| Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ 1

The net result for the period of deducting operating expenses from operating revenues.

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