Commitments	3 Months Ended
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments The Company has outstanding letters of credit of $79 million as of March 31, 2017, principally related to guarantees on contracts. The Company also has outstanding surety bonds in the amount of $131 million, principally related to performance and subcontractor payment bonds on the Company’s contracts. The outstanding letters of credit and surety bonds have various terms with the majority of the letters of credit and bonds expiring over the next four fiscal years. Additionally, the Company has outstanding performance guarantees and cross-indemnity agreements in connection with certain aspects of its business. As of March 31, 2017, the Company is not aware of any existing event of default that would require it to satisfy any of these guarantees.

Commitments

3 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

The Company has outstanding letters of credit of $79 million as of March 31, 2017, principally related to guarantees on contracts. The Company also has outstanding surety bonds in the amount of $131 million, principally related to performance and subcontractor payment bonds on the Company’s contracts. The outstanding letters of credit and surety bonds have various terms with the majority of the letters of credit and bonds expiring over the next four fiscal years.

Additionally, the Company has outstanding performance guarantees and cross-indemnity agreements in connection with certain aspects of its business. As of March 31, 2017, the Company is not aware of any existing event of default that would require it to satisfy any of these guarantees.