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Summary of Components of Net Deferred Income Tax Asset (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Deferred income tax assets: |  |
Tax loss carryforwards | $ 690.5 | $ 708.3
Tax credit carryforwards | 437.2 | 412.8
Retirement benefit plans | 74.3 | 156.6
Accrued liabilities | 133.9 | 115.8
Self-insurance reserves | 9.5 | 11.3
Current asset basis differences | 38.8 | 30.3
Long-term asset basis differences | (64.5) | (18.0)
Deferred compensation | 40.9 | 33.7
Recoverable customer engineering, development and tooling | (22.2) | (11.4)
Undistributed earnings of foreign subsidiaries | (54.3) | (53.8)
Derivative instruments and hedging | (1.6) | (7.0)
Other | (0.8) | (0.7)
Deferred Tax Assets, Gross, Total | 1,281.7 | 1,377.9
Valuation allowance | (642.6) | (628.2)
Net deferred income tax asset | $ 639.1 | $ 749.7

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