Leases - Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Operating leases
Operating lease right-of-use assets	$ 154	$ 161
Other current liabilities	$ 55	$ 50
Operating Lease Liability Current Statement Of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Operating lease liabilities	$ 131	$ 140
Total operating lease liabilities	186	190
Finance leases
Property, plant and equipment, gross	304	300
Accumulated depreciation	(189)	(175)
Property, plant and equipment, net	115	125
Accounts payable and other current liabilities	$ 41	$ 39
Finance Lease Liability Current Statement Of Financial Position [Extensible List]	Accounts payable and other current liabilities	Accounts payable and other current liabilities
Long-term debt and capital lease obligations	$ 53	$ 59
Finance Lease Liability Noncurrent Statement Of Financial Position [Extensible List]	Long-term debt and finance lease obligations	Long-term debt and finance lease obligations
Total finance lease liabilities	$ 94	$ 98
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from finance leases	(1)	(2)
Operating cash flows from operating leases	(13)	(13)
Financing cash flows from finance leases	(8)	(6)
Right-of-use assets obtained in exchange for new finance lease liabilities	3	2
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 11	$ 10
Weighted-average remaining lease term--finance leases	3 years	3 years
Weighted-average remaining lease term--operating leases	7 years	6 years
Weighted-average discount rate--finance leases	5.30%	5.98%
Weighted-average discount rate--operating leases	3.30%	4.31%
Other Intangible Assets
Finance leases
Property, plant and equipment, gross	$ 17	$ 11
Accumulated depreciation	(15)	(9)
Property, plant and equipment, net	$ 2	$ 2