Valuation and Qualifying Accounts and Reserves (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 1,037	$ 1,243	$ 1,397
Amounts charged or credited to income	(225)	(127)	(107)
Allowance utilized	(23)	(28)	(92)
Adjustments arising from change in currency exchange rates and other items	(7)	(51)	45
Balance at end of period	782	1,037	1,243
Allowance for doubtful receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	7	8	8
Amounts charged or credited to income	1	0	1
Allowance utilized	(1)	(1)	(1)
Adjustments arising from change in currency exchange rates and other items	(1)	0	0
Balance at end of period	6	7	8
Inventory reserves [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	48	51	55
Amounts charged or credited to income	20	16	6
Allowance utilized	(15)	(19)	(12)
Adjustments arising from change in currency exchange rates and other items	(5)	0	2
Balance at end of period	48	48	51
Valuation allowance for deferred tax assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	982	1,184	1,334
Amounts charged or credited to income	(246)	(143)	(114)
Allowance utilized	(7)	(8)	(79)
Adjustments arising from change in currency exchange rates and other items	(1)	(51)	43
Balance at end of period	$ 728	$ 982	$ 1,184