Revenues and Long-Lived Assets by Geographical Area (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 1,052	$ 1,390
Property and equipment, net	9,628		$ 9,671
United States
Segment Reporting Information [Line Items]
Revenues	1,038	1,371
Property and equipment, net	9,543		9,570
Brazil
Segment Reporting Information [Line Items]
Revenues	4	6
Property and equipment, net	35		45
Canada
Segment Reporting Information [Line Items]
Revenues	10	$ 13
Property and equipment, net	$ 50		$ 56