Revenue from Contracts with Customers - Summary of Disaggregation of Revenues by Major Revenue Streams (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
Disaggregation of Revenue [Line Items]
Total revenue	$ 4,454	$ 3,978	$ 3,870	$ 4,357	$ 4,468	$ 4,093	$ 4,177	$ 4,149	$ 16,659	$ 16,887	$ 18,271
Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue									14,354	14,510	15,881
Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue									129	147	165
Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue									1,495	1,514	1,373
Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue									680	716	852
International Markets [Member]
Disaggregation of Revenue [Line Items]
Total revenue									2,154	2,246	2,422
International Markets [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue									1,946	2,045	2,151
International Markets [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue									9	4	22
International Markets [Member] \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue									30	20	19
International Markets [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue									169	177	230
Other activities [Member]
Disaggregation of Revenue [Line Items]
Total revenue									1,302	1,304	1,366
Other activities [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue									772	754	739
Other activities [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue									4	5	9
Other activities [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue									527	545	618
North America [Member]
Disaggregation of Revenue [Line Items]
Total revenue									8,447	8,542	9,297
North America [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue									6,902	6,941	7,838
North America [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue									84	109	111
North America [Member] \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue									1,462	1,492	1,347
North America [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue											1
Europe [Member]
Disaggregation of Revenue [Line Items]
Total revenue									4,757	4,795	5,186
Europe [Member] \| Sale of Goods [Member]
Disaggregation of Revenue [Line Items]
Total revenue									4,736	4,770	5,153
Europe [Member] \| Licensing Arrangements [Member]
Disaggregation of Revenue [Line Items]
Total revenue									32	29	23
Europe [Member] \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Total revenue									3	2	7
Europe [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total revenue									$ (14)	$ (6)	$ 3