Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Subsequent Events (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Subsequent Events (Details) - USD ($) $ in Millions	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Subsequent Event [Line Items]
Contract liabilities	$ 3,035		$ 2,940
Total segment sales	8,211	$ 7,243
Engineering
Subsequent Event [Line Items]
Total segment sales	728	$ 674
Russia \| Engineering
Subsequent Event [Line Items]
Contract liabilities	2,000
Russia \| Conflict Between Russia And Ukraine, International Sanctions \| Engineering
Subsequent Event [Line Items]
Total segment sales	$ 350
Assets, Total \| Geographic Concentration Risk \| Russia
Subsequent Event [Line Items]
Concentration risk, percentage			1.00%
Industrial Gas Business \| Revenue from Contract with Customer \| Product Concentration Risk
Subsequent Event [Line Items]
Concentration risk, percentage			1.00%