XML 38 R23.htm IDEA: XBRL DOCUMENT
v3.21.2

Fair value by balance sheet grouping table (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
Fair Value Disclosures [Abstract] |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments | The carrying amount and fair value of our total debt, including short-term borrowings and current maturities of long-term debt, is as follows:
| September 30, 2021 |  | December 31, 2020
Millions of dollars | Level 1 | Level 2 | Total fair value | Carrying value |  | Level 1 | Level 2 | Total fair value | Carrying value
Total debt | $ | 10,896 |  | $ | 147 |  | $ | 11,043 |  | $ | 9,136 |  |  | $ | 10,856 |  | $ | 700 |  | $ | 11,556 |  | $ | 9,827 |

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration