Fair Value (Tables)

9 Months Ended

Sep. 30, 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 Condensed 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
September 30, 2020
Cash and cash equivalents	$	17,472		$	78		$	—		$	17,550
Debt securities - available-for-sale:
U.S. government and agency obligations	3,336			198			—			3,534
State and municipal obligations	—			6,684			—			6,684
Corporate obligations	44			18,881			279			19,204
U.S. agency mortgage-backed securities	—			6,790			—			6,790
Non-U.S. agency mortgage-backed securities	—			2,125			—			2,125
Total debt securities - available-for-sale	3,380			34,678			279			38,337
Equity securities	1,593			30			—			1,623
Assets under management	1,690			2,050			48			3,788
Total assets at fair value	$	24,135		$	36,836		$	327		$	61,298
Percentage of total assets at fair value	39		%	60		%	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 Condensed 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
September 30, 2020
Debt securities - held-to-maturity	$	531	$	99	$	78	$	708	$	698
Long-term debt and other financing obligations	$	—	$	51,785	$	—	$	51,785	$	43,794
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