Financial Assets And Liabilities Measured At Fair Value On Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012 Fair Value, Measurements, Recurring	Dec. 31, 2011 Fair Value, Measurements, Recurring	Jun. 30, 2012 Not Designated as Hedging Instrument	Jun. 30, 2011 Not Designated as Hedging Instrument	Jun. 30, 2012 Not Designated as Hedging Instrument Fair Value, Measurements, Recurring	Dec. 31, 2011 Not Designated as Hedging Instrument Fair Value, Measurements, Recurring	Jun. 30, 2012 Not Designated as Hedging Instrument Foreign Exchange Contract	Jun. 30, 2011 Not Designated as Hedging Instrument Foreign Exchange Contract	Jun. 30, 2011 Designated as Hedging Instrument	Jun. 30, 2012 Designated as Hedging Instrument Fair Value, Measurements, Recurring	Dec. 31, 2011 Designated as Hedging Instrument Fair Value, Measurements, Recurring	Jun. 30, 2012 Less Than 6 Months Not Designated as Hedging Instrument Foreign Exchange Contract Fair Value, Measurements, Recurring Other Current Assets/Liabilities	Dec. 31, 2011 Less Than 6 Months Not Designated as Hedging Instrument Foreign Exchange Contract Fair Value, Measurements, Recurring Other Current Assets/Liabilities		Jun. 30, 2012 Less Than 8 Years Designated as Hedging Instrument Interest Rate Swap	Jun. 30, 2012 Less Than 8 Years Designated as Hedging Instrument Fair Value Hedging Interest Rate Swap Fair Value, Measurements, Recurring Other Non-Current Asset	Dec. 31, 2011 Less Than 8 Years Designated as Hedging Instrument Fair Value Hedging Interest Rate Swap Fair Value, Measurements, Recurring Other Non-Current Asset
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Nominal Volume	$ 1,509.0	$ 905.2	$ 1,449.0	$ 1,212.6	$ 1,449.0	$ 845.2	$ 1,449.0	$ 1,172.3	$ 60.0	$ 60.0	$ 60.0	$ 1,449.0	$ 845.2	[1]	$ 60.0	$ 60.0	$ 60.0
Derivative asset	22.1	19.7			6.0	4.6				16.1	15.1	6.0	4.6			16.1	15.1
Derivative liability	$ 12.0	$ 0.6			$ 12.0	$ 0.6						$ 12.0	$ 0.6

[1] The nominal value is netted for offsetting swaps with a counterpart with which Autoliv has a master netting agreement. The gross nominal value is $1,241.9 million.