Properties, Plants and Equipment (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Properties, Plants and Equipment with Associated Accumulated Depreciation and Amortization

Our gross investment in PP&E and the associated accumulated depreciation and amortization (Accum. D&A) balances were as follows:

	Millions of Dollars
	March 31, 2020				December 31, 2019
	Gross PP&E		Accum. D&A	Net PP&E	Gross PP&E	Accum. D&A	Net PP&E
Midstream	$	11,605	2,467	9,138	11,221	2,391	8,830
Chemicals	—		—	—	—	—	—
Refining	23,956		10,521	13,435	23,692	10,336	13,356
Marketing and Specialties (M&S)	1,660		917	743	1,847	959	888
Corporate and Other	1,352		617	735	1,311	599	712
	$	38,573	14,522	24,051	38,071	14,285	23,786