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Marketable Securities
 9 Months Ended
Sep. 30, 2022
Debt Securities, Available-for-Sale [Abstract]  
Marketable Securities Marketable Securities
The Company invests in asset-backed securities, certificates of deposit/time deposits, commercial paper, and other securities. The following is a summary of amounts recorded on the Consolidated Balance Sheet for marketable securities (current and non-current).
(Millions)September 30,
2022		December 31,
2021
Commercial paper $130 $109 
Certificates of deposit/time deposits 52 14 
U.S. treasury securities — 75 
U.S. municipal securities3 3 
Current marketable securities185 201 
U.S. municipal securities 27 27 
Non-current marketable securities27 27 
Total marketable securities$212 $228 
At September 30, 2022 and December 31, 2021, gross unrealized, gross realized, and net realized gains and/or losses (pre-tax) were not material.
The balances at September 30, 2022 for marketable securities by contractual maturity are shown below. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.
(Millions) September 30,
2022
Due in one year or less $185 
Due after one year through five years 15 
Due after five years through ten years 12 
Total marketable securities $212