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Fair Value Measurements - The carrying value and fair value of financial instruments (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financial assets: |  |
Mortgage loans | $ 646 | $ 676
Long-term debt | 1,478 | 1,496
Level 1 |  |
Financial assets: |  |
Cash and cash equivalents | 857 | 872
Mortgage loans | 0 | 0
Total financial assets not accounted for at fair value | 857 | 872
Long-term debt | 0 | 0
Total financial liabilities not accounted for at fair value | 0 | 0
Level 2 |  |
Financial assets: |  |
Cash and cash equivalents | 0 | 0
Mortgage loans | 0 | 0
Total financial assets not accounted for at fair value | 0 | 0
Long-term debt | 1,283 | 1,299
Total financial liabilities not accounted for at fair value | 1,283 | 1,299
Level 3 |  |
Financial assets: |  |
Cash and cash equivalents | 0 | 0
Mortgage loans | 600 | 626
Total financial assets not accounted for at fair value | 600 | 626
Long-term debt | 3 | 3
Total financial liabilities not accounted for at fair value | 3 | 3
Carrying Value |  |
Financial assets: |  |
Cash and cash equivalents | 857 | 872
Mortgage loans | 646 | 676
Total financial assets not accounted for at fair value | 1,503 | 1,548
Long-term debt | 1,478 | 1,496
Total financial liabilities not accounted for at fair value | 1,478 | 1,496
Fair Value |  |
Financial assets: |  |
Cash and cash equivalents | 857 | 872
Mortgage loans | 600 | 626
Total financial assets not accounted for at fair value | 1,457 | 1,498
Long-term debt | 1,286 | 1,302
Total financial liabilities not accounted for at fair value | $ 1,286 | $ 1,302

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(c)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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