Revenue from Contracts with Customers - Summary of Disaggregation of Revenues by Major Revenue Streams (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenue	$ 4,529	$ 5,617	$ 14,295	$ 16,987
Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	3,803	4,885	12,082	14,615
Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	32	27	137	291
Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	483	499	1,447	1,436
Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue	211	206	629	645
International Markets [Member]
Disaggregation of Revenue [Line Items]
Total revenue	726	882	2,265	2,485
International Markets [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	525	672	1,617	1,862
International Markets [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue		1	21	36
International Markets [Member] \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	149	146	456	406
International Markets [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue	52	63	171	181
Other Activities [Member]
Disaggregation of Revenue [Line Items]
Total revenue	326	312	989	1,034
Other Activities [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	166	168	526	567
Other Activities [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2	1	6	4
Other Activities [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue	158	143	457	463
North America [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2,265	3,043	7,059	9,452
North America [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1,902	2,724	5,983	8,338
North America [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	29	25	91	249
North America [Member] \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	333	294	984	864
North America [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1		1	1
Europe [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1,212	1,380	3,982	4,016
Europe [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1,210	1,321	3,956	3,848
Europe [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue	1		19	2
Europe [Member] \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 1	$ 59	$ 7	$ 166