Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Performance Bonds and Parent Guarantees) - Additional Information (Detail)

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Commitments and Contingencies (Performance Bonds and Parent Guarantees) - Additional Information (Detail) - Performance Bonds [Member]
$ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
Guarantor Obligations [Line Items]  
Total amount of outstanding performance bonds $ 3,400
Estimate [Member]  
Guarantor Obligations [Line Items]  
Estimated cost to complete bonded projects $ 910