Segment and Related Information - Schedule of Geographic Information for Third-party Sales (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 2,392	$ 2,365	$ 2,148	$ 2,381	$ 2,436	$ 2,567	$ 2,711	$ 2,719	$ 9,286	$ 10,433	$ 13,403
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									4,246	4,606	5,887
Spain [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									2,766	3,077	3,806
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									1,884	2,249	2,930
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									346	428	498
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									31	5	216
Other Geographical Regions [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									$ 13	$ 68	$ 66