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Cash and Cash Equivalents and Short-term Investments | 3 Months Ended
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Mar. 31, 2017
Cash, Cash Equivalents, and Short-term Investments [Abstract] |
Cash and Cash Equivalents and Short-term Investments | Cash and Cash Equivalents and Short-term Investments Cash and cash equivalents include cash balances and all highly-liquid instruments with initial maturities of three months or less. Short-term investments consist of money market funds. The estimated fair value of cash and cash equivalents and short-term investments approximates their carrying values. At March 31, 2017, Cash and cash equivalents and Short-term investments were $633 million compared to $716 million at December 31, 2016. Of the total balances, $86 million and $82 million was restricted as to its use at March 31, 2017 and December 31, 2016, respectively. Included within the March 31, 2017 and December 31, 2016 balances, respectively, were £43.3 million ($54.0 million at March 31, 2017 exchange rates) and £43.3 million ($53.2 million at December 31, 2016 exchange rates) of operating funds required to be held by the Company in the U.K. by the Financial Conduct Authority, a U.K.-based regulator, which were included in Short-term investments.

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- Definition The entire disclosure of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities. + References No definition available. + Details
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