Summary of Balances and Transactions (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Current Balances:
Accounts receivable, related party	$ 1		$ 1		$ 113
Due to related party					7
Deferred revenue, related party	106		106		66
Long-term Balances:
Long-term deferred revenue, related party	19		19		39
Net sales	28	$ 54	66	$ 109
BAT Affiliate
Current Balances:
Accounts receivable, related party	1		1		113
Due to related party					7
Deferred revenue, related party	106		106		66
Long-term Balances:
Long-term deferred revenue, related party	19		19		$ 39
Net sales	28	54	66	109
Purchases	$ 1	$ 6	$ 2	$ 8