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Cash and Cash Equivalents and Short-term Investments | 6 Months Ended
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Jun. 30, 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 June 30, 2017, Cash and cash equivalents and Short-term investments were $3,430 million compared to $716 million at December 31, 2016, an increase of $2,714 million that was primarily related to the receipt of proceeds from the sale of the Divested Business. Of the total balances, $91 million and $82 million was restricted as to its use at June 30, 2017 and December 31, 2016, respectively. Included within the June 30, 2017 and December 31, 2016 balances, respectively, were £42.7 million ($54.3 million at June 30, 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 United Kingdom 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 + Details
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