Segment and Related Information - Schedule of Geographic Information for Long-Lived Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 6,623	$ 7,190
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	2,091	2,282
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,118	1,215
Iceland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,048	1,102
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	958	1,002
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	874	1,009
Norway [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	338	357
Spain [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	193	218
Other Geographical Regions [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 3	$ 5