Acquisitions (Notes)	9 Months Ended
Sep. 30, 2022
Business Combinations [Abstract]
Acquisitions	AcquisitionsOn July 6, 2022, the Company acquired GlideFast Holdings, LLC and affiliated entities ("GlideFast"), a ServiceNow consulting company, for $351.8 million in cash. GlideFast is part of the Commercial Segment and its results of operations are included in the consolidated results of the Company from the date of its acquisition. The purchase accounting for this acquisition remains incomplete with respect to the provisional fair value of assets acquired and liabilities assumed, as management continues to gather and evaluate information about circumstances that existed as of the acquisition date. Measurement period adjustments will be recognized prospectively within 12 months from the date of acquisition. The preliminary fair value of the identifiable intangible assets related to this acquisition totaled $102.8 million, including a trademark of $30.2 million which has an indefinite life. Other acquired identifiable intangible assets have useful lives ranging from three to nine years. In 2021, the Company acquired three consulting services businesses for $221.3 million in cash. These acquisitions increased the Company's investment in IT consulting in its Commercial and Federal Government segments. The fair values allocated to the assets and liabilities for these acquisitions have been finalized.

Acquisitions (Notes)

9 Months Ended

Sep. 30, 2022

AcquisitionsOn July 6, 2022, the Company acquired GlideFast Holdings, LLC and affiliated entities ("GlideFast"), a ServiceNow consulting company, for $351.8 million in cash. GlideFast is part of the Commercial Segment and its results of operations are included in the consolidated results of the Company from the date of its acquisition. The purchase accounting for this acquisition remains incomplete with respect to the provisional fair value of assets acquired and liabilities assumed, as management continues to gather and evaluate information about circumstances that existed as of the acquisition date. Measurement period adjustments will be recognized prospectively within 12 months from the date of acquisition. The preliminary fair value of the identifiable intangible assets related to this acquisition totaled $102.8 million, including a trademark of $30.2 million which has an indefinite life. Other acquired identifiable intangible assets have useful lives ranging from three to nine years. In 2021, the Company acquired three consulting services businesses for $221.3 million in cash. These acquisitions increased the Company's investment in IT consulting in its Commercial and Federal Government segments. The fair values allocated to the assets and liabilities for these acquisitions have been finalized.