Subsequent Events	12 Months Ended
Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Certain of our businesses have been adversely affected by the economic impacts of the outbreak of the novel strain of coronavirus ("COVID-19") and the steep decline in commodity prices that occurred in the early part of 2020. Both of these events have created significant uncertainty and economic volatility and disruption, which have impacted and may continue to impact our business operations. We have experienced, and may continue to experience, reductions in demand for certain of our services and the delay or abandonment of ongoing or anticipated projects due to our clients’, suppliers’ and other third parties’ diminished financial conditions or financial distress, as well as governmental budget constraints. These impacts are expected to continue or worsen if stay-at-home, social distancing, travel restrictions and other similar orders or restrictions remain in place for an extended period of time or are re-imposed after being lifted or eased. Because of these events, we performed interim impairment testing of our goodwill, intangible assets and investments. We also evaluated the impact of these events on our reserves for credit risk and the fair value of our assets held for sale. While significant uncertainty exists concerning the magnitude of the impact and duration of these events, we expect to recognize losses ranging from $450 million to $475 million during the first quarter of 2020, for such matters.

Subsequent Events

12 Months Ended

Dec. 31, 2019

Certain of our businesses have been adversely affected by the economic impacts of the outbreak of the novel strain of coronavirus ("COVID-19") and the steep decline in commodity prices that occurred in the early part of 2020. Both of these events have created significant uncertainty and economic volatility and disruption, which have impacted and may continue to impact our business operations. We have experienced, and may continue to experience, reductions in demand for certain of our services and the delay or abandonment of ongoing or anticipated projects due to our clients’, suppliers’ and other third parties’ diminished financial conditions or financial distress, as well as governmental budget constraints. These impacts are expected to continue or worsen if stay-at-home, social distancing, travel restrictions and other similar orders or restrictions remain in place for an extended period of time or are re-imposed after being lifted or eased. Because of these events, we performed interim impairment testing of our goodwill, intangible assets and investments. We also evaluated the impact of these events on our reserves for credit risk and the fair value of our assets held for sale. While significant uncertainty exists concerning the magnitude of the impact and duration of these events, we expect to recognize losses ranging from $450 million to $475 million during the first quarter of 2020, for such matters.