Accumulated Other Comprehensive Loss	3 Months Ended
Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	Note 12—Accumulated Other Comprehensive Loss Accumulated other comprehensive loss in the equity section of our consolidated balance sheet included: Millions of Dollars Defined Benefit Plans Net Unrealized Gain (Loss) on Securities Foreign Currency Translation Accumulated Other Comprehensive Loss December 31, 2020 $ (425) 2 (4,795) (5,218) Other comprehensive income (loss) 70 (1) 69 138 March 31, 2021 $ (355) 1 (4,726) (5,080) The following table summarizes reclassifications out of accumulated other comprehensive loss and into net income (loss): Millions of Dollars Three Months Ended March 31 2021 2020 Defined benefit plans $ 12 8 The above amounts are included in the computation of net periodic benefit cost and are presented net of tax expense of $ 3 million and $ 2 million for the three-month periods ended March 31, 2021 and 2020, respectively. See Note 14—Employee Benefit Plans, for additional information.

Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2021

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Loss

Note 12—Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss in the

equity section of our consolidated balance

sheet included:

Millions of Dollars

Defined Benefit

Plans

Net Unrealized

Gain (Loss) on

Securities

Foreign

Currency

Translation

Accumulated

Other

Comprehensive

Loss

December 31, 2020

(425)

(4,795)

(5,218)

Other comprehensive income (loss)

(1)

138

March 31, 2021

(355)

(4,726)

(5,080)

The following table summarizes reclassifications

out of accumulated other comprehensive loss and into

net

income (loss):

Millions of Dollars

Three Months Ended

March 31

2021

2020

Defined benefit plans

The above amounts are included in the computation of net periodic benefit

cost and are presented net of tax expense of $

million and

million for the three-month periods ended March 31, 2021 and 2020, respectively.

See Note 14—Employee Benefit Plans, for additional

information.