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Basis of Presentation and Summary of Significant Accounting Policies Contract Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accounting Policies [Abstract]
Contract liabilities	$ 625		$ 516
Contract with Customer, Liability, Noncurrent	65		$ 69
Revenue recognized that was included in contract liabilities	228	$ 255
Remaining performance obligations	$ 4,200

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044

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