SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowances for sales returns and price protection and other allowances
Valuation and qualifying accounts, reconciliation
Valuation and qualifying accounts, balance at the beginning of period	$ 257	$ 339	$ 379
Valuation and qualifying accounts, additions	83	119	114
Valuation and qualifying accounts, deductions	(66)	(201)	(154)
Valuation and qualifying accounts, balance at the end of period	274	257	339
Allowance for doubtful accounts
Valuation and qualifying accounts, reconciliation
Valuation and qualifying accounts, balance at the beginning of period	4	4	4
Valuation and qualifying accounts, additions	1	2	1
Valuation and qualifying accounts, deductions	0	(2)	(1)
Valuation and qualifying accounts, balance at the end of period	$ 5	$ 4	$ 4