12. Other Financial Information

Accrued expenses and other current liabilities consist of the following:

	December 31, 2017		September 30, 2017
	(in millions)
Accrued salaries and benefits	$	900.8	$	1,018.5
Accrued contract costs	833.5		911.9
Other accrued expenses	337.9		315.1

	$	2,072.2	$	2,245.5

Accrued contract costs above include balances related to professional liability accruals of $537.7 million and $547.9 million as of December 31, 2017 and September 30, 2017, respectively. The remaining accrued contract costs primarily relate to costs for services provided by subcontractors and other non-employees. Liabilities recorded related to accrued contract losses were not material as of December 31, 2017 and September 30, 2017. The Company did not have material revisions to estimates for contracts where revenue is recognized using the percentage-of-completion method during the three months ended December 31, 2017. The Company incurred $22.4 million of primarily severance expenses relating to restructuring activities during the three months ended December 31, 2017, of which $9.6 million was paid as of December 31, 2017.

During the twelve months ended September 30, 2016, the Company recorded revenue related to the expected accelerated recovery of a pension related entitlement from the federal government of approximately $50 million, which is included in accounts receivable-net at December 31, 2017. The entitlement resulted from pension costs that are reimbursable through certain government contracts in accordance with Cost Accounting Standards. The accelerated recognition resulted from an amendment to freeze pension benefits under URS Federal Services, Inc. Employees Retirement Plan. The actual amount of reimbursement may vary from the Company’s expectation.