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Fair Value (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial Assets and Liabilities, Measured at Fair Value Recurring Basis [Table Text Block]

The following table presents a summary of fair value measurements by level and carrying values for items measured at fair value on a recurring basis in the Consolidated Balance Sheets:

(in millions)						Quoted Prices in Active Markets (Level 1)						Other Observable Inputs (Level 2)						Unobservable Inputs (Level 3)						Total Fair and Carrying Value
December 31, 2020
Cash and cash equivalents						$	16,841					$	80					$	—					$	16,921
Debt securities - available-for-sale:
U.S. government and agency obligations						3,241						224						—						3,465
State and municipal obligations						—						7,328						—						7,328
Corporate obligations						25						19,424						288						19,737
U.S. agency mortgage-backed securities						—						7,091						—						7,091
Non-U.S. agency mortgage-backed securities						—						2,207						—						2,207
Total debt securities - available-for-sale						3,266						36,274						288						39,828
Equity securities						1,795						33						—						1,828
Assets under management						1,774						2,250						52						4,076
Total assets at fair value						$	23,676					$	38,637					$	340					$	62,653
Percentage of total assets at fair value						38		%				61		%				1		%				100		%
December 31, 2019
Cash and cash equivalents						$	10,837					$	148					$	—					$	10,985
Debt securities - available-for-sale:
U.S. government and agency obligations						3,369						184						—						3,553
State and municipal obligations						—						5,926						—						5,926
Corporate obligations						70						17,923						249						18,242
U.S. agency mortgage-backed securities						—						6,528						—						6,528
Non-U.S. agency mortgage-backed securities						—						1,845						—						1,845
Total debt securities - available-for-sale						3,439						32,406						249						36,094
Equity securities						1,734						22						—						1,756
Assets under management						1,123						1,918						35						3,076
Total assets at fair value						$	17,133					$	34,494					$	284					$	51,911
Percentage of total assets at fair value						33		%				66		%				1		%				100		%

Fair Value Measurements, Nonrecurring [Table Text Block]

The following table presents a summary of fair value measurements by level and carrying values for certain financial instruments not measured at fair value on a recurring basis in the Consolidated Balance Sheets:

(in millions)						Quoted Prices in Active Markets (Level 1)						Other Observable Inputs (Level 2)						Unobservable Inputs (Level 3)						Total Fair Value						Total Carrying Value
December 31, 2020
Debt securities - held-to-maturity						$	466					$	108					$	73					$	647					$	638
Long-term debt and other financing obligations						$	—					$	51,254					$	—					$	51,254					$	42,171
December 31, 2019
Debt securities - held-to-maturity						$	541					$	181					$	253					$	975					$	972
Long-term debt and other financing obligations						$	—					$	45,078					$	—					$	45,078					$	40,278

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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 (bbb)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 3: 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

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-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

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