Retirement Plans (Details Textuals) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plans
Retirement Plans (Textuals) [Abstract]
Total expense for all defined contribution retirement plans	$ 269	$ 267	$ 278
Other Postretirement Benefit Plans
Retirement Plans (Textuals) [Abstract]
Total net benefit (expense)	26	8	$ 8
Defined benefit plans, unfunded status	$ 414	$ 706

Amount of net periodic benefit cost (credit) for defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration