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Investments (Notes)
 3 Months Ended
Mar. 31, 2023
Investments [Abstract]  
Investments [Text Block] Investments
A summary of debt securities by major security type is as follows:
(in millions)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
March 31, 2023
Debt securities - available-for-sale:
U.S. government and agency obligations$4,760 $5 $(236)$4,529 
State and municipal obligations8,055 65 (365)7,755 
Corporate obligations24,149 59 (1,525)22,683 
U.S. agency mortgage-backed securities8,213 35 (708)7,540 
Non-U.S. agency mortgage-backed securities3,156 1 (283)2,874 
Total debt securities - available-for-sale48,333 165 (3,117)45,381 
Debt securities - held-to-maturity:
U.S. government and agency obligations594 — (10)584 
State and municipal obligations28 — (3)25 
Corporate obligations60 — — 60 
Total debt securities - held-to-maturity682 — (13)669 
Total debt securities$49,015 $165 $(3,130)$46,050 
December 31, 2022
Debt securities - available-for-sale:
U.S. government and agency obligations$4,093 $1 $(285)$3,809 
State and municipal obligations7,702 25 (479)7,248 
Corporate obligations23,675 17 (1,798)21,894 
U.S. agency mortgage-backed securities7,379 15 (808)6,586 
Non-U.S. agency mortgage-backed securities3,077 1 (294)2,784 
Total debt securities - available-for-sale45,926 59 (3,664)42,321 
Debt securities - held-to-maturity:
U.S. government and agency obligations578 — (14)564 
State and municipal obligations29 — (3)26 
Corporate obligations89 — — 89 
Total debt securities - held-to-maturity696 — (17)679 
Total debt securities$46,622 $59 $(3,681)$43,000 
The Company held $3.9 billion and $3.7 billion of equity securities as of March 31, 2023 and December 31, 2022, respectively. The Company’s investments in equity securities primarily consist of employee savings plan related investments, venture investments and shares of Brazilian real denominated fixed-income funds with readily determinable fair values. Additionally, the Company’s investments included $1.5 billion of equity method investments in operating businesses in the health care sector as of March 31, 2023 and December 31, 2022. The allowance for credit losses on held-to-maturity securities at March 31, 2023 and December 31, 2022 was not material.
The amortized cost and fair value of debt securities as of March 31, 2023, by contractual maturity, were as follows:
Available-for-SaleHeld-to-Maturity
(in millions)Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Due in one year or less$4,722 $4,691 $377 $376 
Due after one year through five years14,356 13,708 261 254 
Due after five years through ten years12,240 11,217 24 22 
Due after ten years5,646 5,351 20 17 
U.S. agency mortgage-backed securities8,213 7,540 — — 
Non-U.S. agency mortgage-backed securities3,156 2,874 — — 
Total debt securities$48,333 $45,381 $682 $669 
The fair value of available-for-sale debt securities with gross unrealized losses by major security type and length of time that individual securities have been in a continuous unrealized loss position were as follows:
 Less Than 12 Months12 Months or Greater Total
(in millions)Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
March 31, 2023
Debt securities - available-for-sale:
U.S. government and agency obligations
$1,279 $(12)$1,825 $(224)$3,104 $(236)
State and municipal obligations1,898 (30)3,110 (335)5,008 (365)
Corporate obligations6,337 (178)12,443 (1,347)18,780 (1,525)
U.S. agency mortgage-backed securities1,589 (55)4,274 (653)5,863 (708)
Non-U.S. agency mortgage-backed securities
783 (26)1,989 (257)2,772 (283)
Total debt securities - available-for-sale$11,886 $(301)$23,641 $(2,816)$35,527 $(3,117)
December 31, 2022
Debt securities - available-for-sale:
U.S. government and agency obligations
$2,007 $(96)$1,290 $(189)$3,297 $(285)
State and municipal obligations4,630 (288)1,178 (191)5,808 (479)
Corporate obligations13,003 (893)6,637 (905)19,640 (1,798)
U.S. agency mortgage-backed securities3,561 (345)2,239 (463)5,800 (808)
Non-U.S. agency mortgage-backed securities
1,698 (128)976 (166)2,674 (294)
Total debt securities - available-for-sale$24,899 $(1,750)$12,320 $(1,914)$37,219 $(3,664)
The Company’s unrealized losses from debt securities as of March 31, 2023 were generated from approximately 32,000 positions out of a total of 42,000 positions. The Company believes that it will collect the timely principal and interest due on its debt securities that have an amortized cost in excess of fair value. The unrealized losses were primarily caused by interest rate increases and not by unfavorable changes in the credit quality associated with these securities which impacted the Company’s assessment on collectability of principal and interest. At each reporting period, the Company evaluates available-for-sale debt securities for any credit-related impairment when the fair value of the investment is less than its amortized cost. The Company evaluated the expected cash flows, the underlying credit quality and credit ratings of the issuers noting no significant credit deterioration since purchase. As of March 31, 2023, the Company did not have the intent to sell any of the available-for-sale debt securities in an unrealized loss position. Therefore, the Company believes these losses to be temporary. The allowance for credit losses on available-for-sale debt securities at March 31, 2023 and December 31, 2022 was not material.