XML 41 R27.htm IDEA: XBRL DOCUMENT
v3.20.2

Fair Value of Financial Instruments (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2020
Fair Value Disclosures [Abstract] |
Schedule of Carrying Amounts and Estimated Fair Values | The carrying amounts and estimated fair values, based on Level 1 inputs, of long-term debt consisted of the following:
| June 30, 2020 |  |  |  | December 31, 2019 |  |
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
| ($ in millions) |  |  |  |  |  |
Long-term debt, including current maturities | $ | (12,697) |  |  | $ | (16,362) |  |  | $ | (12,196) |  |  | $ | (14,806) |

X
- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueByBalanceSheetGroupingTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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