Fair Value (Tables)

6 Months Ended

Jun. 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
June 30, 2020
Cash and cash equivalents	$	22,215		$	112		$	—		$	22,327
Debt securities - available-for-sale:
U.S. government and agency obligations	3,419			161			—			3,580
State and municipal obligations	—			6,199			—			6,199
Corporate obligations	63			17,654			267			17,984
U.S. agency mortgage-backed securities	—			6,279			—			6,279
Non-U.S. agency mortgage-backed securities	—			1,944			—			1,944
Total debt securities - available-for-sale	3,482			32,237			267			35,986
Equity securities	1,530			23			—			1,553
Assets under management	1,441			1,932			44			3,417
Total assets at fair value	$	28,668		$	34,304		$	311		$	63,283
Percentage of total assets at fair value	45		%	54		%	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
June 30, 2020
Debt securities - held-to-maturity	$	566	$	96	$	85	$	747	$	737
Long-term debt and other financing obligations	$	—	$	53,119	$	—	$	53,119	$	45,284
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