Pension and Other Benefit Plans - Weighted-Average Allocation of Plan Assets and Target Allocation by Asset Category (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Total	100.00%	100.00%
Target allocation of assets	100.00%	100.00%
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Total	100.00%	100.00%
Target allocation of assets	100.00%	100.00%
Equity securities | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	45.00%
Target Allocation Percentage of Assets, Range Maximum	55.00%
Target allocation of assets	50.00%	47.00%
Equity securities | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	50.00%
Target Allocation Percentage of Assets, Range Maximum	70.00%
Target allocation of assets	60.00%	56.00%
Debt securities | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	33.00%
Target Allocation Percentage of Assets, Range Maximum	45.00%
Target allocation of assets	40.00%	42.00%
Debt securities | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	25.00%
Target Allocation Percentage of Assets, Range Maximum	40.00%
Target allocation of assets	31.00%	35.00%
Cash and cash equivalents | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	3.00%
Target allocation of assets	2.00%	2.00%
Cash and cash equivalents | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	3.00%
Target allocation of assets	3.00%	3.00%
Alternative investments | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	10.00%
Target allocation of assets	8.00%	9.00%
Alternative investments | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	20.00%
Target allocation of assets	6.00%	6.00%