Financial Instruments - Fair Value of Derivative Instruments (Details) $ in Millions		Dec. 31, 2021 EUR (€)	Dec. 31, 2021 USD ($)	Sep. 20, 2021 EUR (€)	Dec. 31, 2020 USD ($)
Derivatives, Fair Value [Line Items]
Asset Derivatives			$ 687		$ 465
Liability Derivatives			242		716
0.000% Notes Due September 2024 | Exchangeable Notes
Derivatives, Fair Value [Line Items]
Debt issued | €		€ 300,000,000		€ 300,000,000
Derivatives designated as accounting hedges
Derivatives, Fair Value [Line Items]
Asset Derivatives			144		126
Liability Derivatives			62		469
Derivatives designated as accounting hedges | Interest rate contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives			27		12
Liability Derivatives			17		340
Derivatives designated as accounting hedges | Net investment hedge contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives	[1]		117		114
Liability Derivatives	[1]		45		129
Derivatives not designated as accounting hedges
Derivatives, Fair Value [Line Items]
Asset Derivatives			543		339
Liability Derivatives			180		247
Derivatives not designated as accounting hedges | Currency exchange contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives			156		134
Liability Derivatives			40		119
Derivatives not designated as accounting hedges | Commodity contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives			387		205
Liability Derivatives			137		128
Derivatives not designated as accounting hedges | Equity method investment contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives	[2]		0		0
Liability Derivatives	[2]		$ 3		$ 0

[1] Net investment hedge contracts consist of cross-currency interest rate swaps and forward contracts. We also designate some of our non-U.S. dollar denominated debt to hedge a portion of our net investments in our non-U.S. operations. This debt is not reflected in the table above, but is included in long-term debt discussed in Note 9, Debt and Borrowing Arrangements. Both net investment hedge derivative contracts and non-U.S. dollar denominated debt acting as net investment hedges are also disclosed in the Derivative Volume table and the Hedges of Net Investments in International Operations section appearing later in this footnote.

[2] Equity method investment contracts consist of the bifurcated embedded derivative option that was a component of the September 20, 2021 €300 million exchangeable bonds issuance. Refer to Note 9, Debt and Borrowing Arrangements