Revenue Recognition - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) distribution_method	Dec. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Number of distribution methods | distribution_method	3
Contract assets	$ 134	$ 162
Contract liabilities	3,699	2,301
Contract liabilities	2,940	1,769
Contract with customer, liability, revenue recognized	1,173
Estimated consideration related to unsatisfied performance obligations	$ 57,000
Long term supply contract, term	20 years
Minimum purchase requirements earned, term	5 years
Other Noncurrent Liabilities
Disaggregation of Revenue [Line Items]
Other	$ 759	$ 532
Minimum
Disaggregation of Revenue [Line Items]
On-site product supply contract	10 years
Maximum
Disaggregation of Revenue [Line Items]
On-site product supply contract	20 years
Merchant | Minimum
Disaggregation of Revenue [Line Items]
Customer supply agreements	3 years
Merchant | Maximum
Disaggregation of Revenue [Line Items]
Customer supply agreements	7 years
Packaged Gas | Minimum
Disaggregation of Revenue [Line Items]
Customer supply agreements	1 year
Packaged Gas | Maximum
Disaggregation of Revenue [Line Items]
Customer supply agreements	3 years