Fair Value (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Financial assets measured at fair value on a recurring basis on the condensed consolidated balance sheets at March 31, 2021 and December 31, 2020 were as follows:

In millions	Level 1		Level 2		Level 3		Total
March 31, 2021
Cash and cash equivalents	$	1,913	$	3,685	$	—	$	5,598
Debt securities:
U.S. government securities	2,256		50		—		2,306
States, municipalities and political subdivisions	—		2,916		—		2,916
U.S. corporate securities	—		9,282		42		9,324
Foreign securities	—		2,858		—		2,858
Residential mortgage-backed securities	—		762		—		762
Commercial mortgage-backed securities	—		985		—		985
Other asset-backed securities	—		2,323		—		2,323
Redeemable preferred securities	—		29		1		30
Total debt securities	2,256		19,205		43		21,504
Equity securities	15		—		30		45
Total	$	4,184	$	22,890	$	73	$	27,147
December 31, 2020
Cash and cash equivalents	$	3,985	$	3,869	$	—	$	7,854
Debt securities:
U.S. government securities	2,370		99		—		2,469
States, municipalities and political subdivisions	—		2,727		1		2,728
U.S. corporate securities	—		8,842		52		8,894
Foreign securities	—		2,918		—		2,918
Residential mortgage-backed securities	—		705		—		705
Commercial mortgage-backed securities	—		1,046		—		1,046
Other asset-backed securities	—		2,403		—		2,403
Redeemable preferred securities	—		24		1		25
Total debt securities	2,370		18,764		54		21,188
Equity securities	17		—		30		47
Total	$	6,372	$	22,633	$	84	$	29,089

During the three months ended March 31, 2021 and 2020, there were no transfers into or out of Level 3.

Fair Value, by Balance Sheet Grouping

The carrying value and estimated fair value classified by level of fair value hierarchy for financial instruments carried on the condensed consolidated balance sheets at adjusted cost or contract value at March 31, 2021 and December 31, 2020 were as follows:

	Carrying Value		Estimated Fair Value
In millions			Level 1		Level 2		Level 3		Total
March 31, 2021
Assets:
Mortgage loans	$	997	$	—	$	—	$	1,011	$	1,011
Equity securities (1)	194		N/A		N/A		N/A		N/A
Liabilities:
Investment contract liabilities:
With a fixed maturity	5		—		—		5		5
Without a fixed maturity	322		—		—		353		353
Long-term debt	61,692		68,890		—		—		68,890
December 31, 2020
Assets:
Mortgage loans	$	1,047	$	—	$	—	$	1,070	$	1,070
Equity securities (1)	145		N/A		N/A		N/A		N/A
Liabilities:
Investment contract liabilities:
With a fixed maturity	5		—		—		5		5
Without a fixed maturity	322		—		—		371		371
Long-term debt	64,647		75,940		—		—		75,940

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(1)It was not practical to estimate the fair value of these cost-method investments as it represents shares of unlisted companies.

Schedule of Fair Value of Separate Accounts by Major Category of Investment

Separate Accounts financial assets as of March 31, 2021 and December 31, 2020 were as follows:

	March 31, 2021								December 31, 2020
In millions	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	5	$	249	$	—	$	254	$	2	$	186	$	—	$	188
Debt securities	1,084		2,655		—		3,739		1,465		2,634		—		4,099
Equity securities	—		2		—		2		—		2		—		2
Common/collective trusts	—		480		—		480		—		563		—		563
Total (1)	$	1,089	$	3,386	$	—	$	4,475	$	1,467	$	3,385	$	—	$	4,852

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(1)Excludes $217 million and $29 million of other receivables at March 31, 2021 and December 31, 2020, respectively.