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Schedule of Restructuring Costs (Detail) (USD $)	12 Months Ended			36 Months Ended
Schedule of Restructuring Costs (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
2014-2018 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	$ 0
Charges	274,000,000
Cash spent	(17,000,000)
Non-cash settlements	(28,000,000)
Currency	(5,000,000)
Balance at end of period	224,000,000			224,000,000
2012-2014 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	68,000,000	36,000,000
Charges	360,000,000	267,000,000	102,000,000	729,000,000
Cash spent	(130,000,000)	(108,000,000)	(33,000,000)
Non-cash settlements	(161,000,000)	(127,000,000)	(33,000,000)
Currency	(9,000,000)
Balance at end of period	128,000,000	68,000,000	36,000,000	128,000,000
Severance And Related Costs
Restructuring Cost and Reserve [Line Items]
Charges	73,000,000
Severance And Related Costs \| 2014-2018 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	0
Charges	251,000,000
Cash spent	(17,000,000)
Non-cash settlements	(5,000,000)
Currency	(5,000,000)
Balance at end of period	224,000,000			224,000,000
Severance And Related Costs \| 2012-2014 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	68,000,000	36,000,000
Charges	201,000,000	176,000,000
Cash spent	(130,000,000)	(108,000,000)
Non-cash settlements	(2,000,000)	(36,000,000)
Currency	(9,000,000)
Balance at end of period	128,000,000	68,000,000		128,000,000
Asset Write-Downs \| 2014-2018 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	0
Charges	23,000,000
Non-cash settlements	(23,000,000)
Balance at end of period	0			0
Asset Write-Downs \| 2012-2014 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period	0	0
Charges	159,000,000	91,000,000
Non-cash settlements	(159,000,000)	(91,000,000)
Balance at end of period	$ 0	$ 0		$ 0