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Shareholders' equity AOCI (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance – beginning of year, net of tax | $ 59,714 | $ 59,441 |
Balance – end of year, net of tax | 50,540 | 59,714 | $ 59,441
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance – beginning of year, net of tax | 2,256 | 4,673 | 2,543
OCI, before Reclassifications, before Tax, Attributable to Parent | (11,627) | (2,935) | 2,311
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | 1,049 | (3) | 281
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent | (10,578) | (2,938) | 2,592
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 1,043 | 521 | (462)
Balance – end of year, net of tax | (7,279) | 2,256 | 4,673
Cumulative Translation Adjustment |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance – beginning of year, net of tax | (2,146) | (1,637) | (1,939)
OCI, before Reclassifications, before Tax, Attributable to Parent | (982) | (530) | 306
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | (4) | 0 | 0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent | (986) | (530) | 306
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 59 | 21 | (4)
Balance – end of year, net of tax | (3,073) | (2,146) | (1,637)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance – beginning of year, net of tax | 0 | 0 | 0
OCI, before Reclassifications, before Tax, Attributable to Parent | 17 | 0 | 0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | (100) | 0 | 0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent | (83) | 0 | 0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 17 | 0 | 0
Balance – end of year, net of tax | (66) | 0 | 0
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance – beginning of year, net of tax | 240 | (167) | 15
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent | (17) | 522 | (232)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 2 | (115) | 50
Balance – end of year, net of tax | 225 | 240 | (167)
Accumulated Other Comprehensive Income |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Balance – beginning of year, net of tax | 350 | 2,869 | 619
Balance – end of year, net of tax | $ (10,193) | $ 350 | $ 2,869

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI https://asc.fasb.org/extlink&oid=122038336&loc=d3e74512-122707 Reference 4: 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(31)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: 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(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 6: 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(30)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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