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Schedule of Target Assets Allocation (Detail) | 12 Months Ended
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Dec. 31, 2016
Barclays Corporate A or Better Index | U.S. corporate fixed income |
Defined Benefit Plan Disclosure |
Target assets allocation percentage | 76.00%
MSCI World Minimum Volatility Index | Global equity Securities |
Defined Benefit Plan Disclosure |
Target assets allocation percentage | 10.00%
Barclays U.S. Long Government/Credit Bond Index | U.S. government fixed income |
Defined Benefit Plan Disclosure |
Target assets allocation percentage | 8.00%
Barclays Corporate High Yield Issuer Cap Index | High yield fixed income |
Defined Benefit Plan Disclosure |
Target assets allocation percentage | 5.00%
Citi Group Three Month Treasury Bill Index | Cash |
Defined Benefit Plan Disclosure |
Target assets allocation percentage | 1.00%

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