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Pensions and Other Postretirement Benefits - Fair Value of Plan Assets (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 2,260	$ 2,861
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,066	1,425
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,194	1,436
Common stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,011	1,383
Common stock | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,011	1,383
Common stock | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	336	397
International equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	336	397
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	291	367
Debt securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Debt securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	291	367
Domestic equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	160	189
Domestic equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Domestic equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	160	189
Government and agencies securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	158	170
Government and agencies securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Government and agencies securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	158	170
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100	120
Corporate bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100	120
Mortgage and other asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28	33
Mortgage and other asset-backed securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mortgage and other asset-backed securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28	33
Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	121	160
Commingled funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Commingled funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	121	160
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55	42
Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55	42
Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0

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- Definition

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+ References

No definition available.

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
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