Revenue from Contracts with Customers - Summary of Disaggregation of Revenues by Major Revenue Streams (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenue	$ 4,701	$ 5,720	$ 9,766	$ 11,370
Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	3,986	4,894	8,279	9,730
Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	41	140	105	264
Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	477	464	964	937
Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue	197	222	418	439
International Markets [Member]
Disaggregation of Revenue [Line Items]
Total revenue	789	885	1,539	1,603
International Markets [Member] | Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	573	661	1,092	1,190
International Markets [Member] | Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1	34	21	35
International Markets [Member] | Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	154	135	307	260
International Markets [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue	61	55	119	118
Other Activities [Member]
Disaggregation of Revenue [Line Items]
Total revenue	321	371	663	722
Other Activities [Member] | Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	183	203	360	399
Other Activities [Member] | Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2	2	4	3
Other Activities [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue	136	166	299	320
North America [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2,263	3,169	4,794	6,409
North America [Member] | Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1,913	2,790	4,081	5,614
North America [Member] | Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	30	103	62	224
North America [Member] | Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	320	275	651	570
North America [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue		1		1
Europe [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1,328	1,295	2,770	2,636
Europe [Member] | Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1,317	1,240	2,746	2,527
Europe [Member] | Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	8	1	18	2
Europe [Member] | Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 3	$ 54	$ 6	$ 107