Business Segment Information - Summary by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of net sales and net long-lived assets by geographic area
Net sales	$ 2,719	$ 2,953	$ 3,017	$ 2,785	$ 2,803	$ 2,946	$ 3,101	$ 2,785	$ 11,474	$ 11,635	$ 10,983
Net long-lived assets	6,055				5,951				6,055	5,951
U.S.
Summary of net sales and net long-lived assets by geographic area
Net sales									5,747	5,783	5,496
Net long-lived assets	2,024				1,708				2,024	1,708
Brazil
Summary of net sales and net long-lived assets by geographic area
Net sales									1,351	1,380	1,427
Net long-lived assets	750				865				750	865
U.K.
Summary of net sales and net long-lived assets by geographic area
Net long-lived assets	626				701				626	701
Other
Summary of net sales and net long-lived assets by geographic area
Net sales									4,376	4,472	$ 4,060
Net long-lived assets	$ 2,655				$ 2,677				$ 2,655	$ 2,677