Pensions and Other Benefits - Benefit Payments Expected to be Paid from Defined Benefit Plans (Details) $ in Millions	Dec. 31, 2021 USD ($)
Pension Benefits
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
2022	$ 407
2023	397
2024	427
2025	378
2026	368
Years 2027 - 2029	1,690
Other Benefits
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
2022	135
2023	130
2024	127
2025	127
2026	126
Years 2027 - 2029	$ 562

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]

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