Derivative Instruments and Hedging Activities - Part 2 (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Liabilities
Derivative Liabilities, Gross	$ 638	$ 679
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	257	189
Other Current Assets [Member]
Derivatives Fair Value Table [Line Items]
Derivative Asset, Current	120	51
Other Current Liabilities [Member]
Derivatives Fair Value Table [Line Items]
Derivative Liability, Current	215	236
Other Noncurrent Assets [Member]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Asset, Noncurrent	137	138
Other Noncurrent Liabilities [Member]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Liability, Noncurrent	423	443
Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	498	518
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	99	60
Not Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	140	161
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	158	129
Interest Rate Contract [Member]
Liabilities
Derivative Liabilities, Gross	473	610
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	48	13
Interest Rate Contract [Member] \| Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	466	506
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	48	13
Interest Rate Contract [Member] \| Not Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	7	104
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	0	0
Cross currency derivatives [Member]
Liabilities
Derivative Liabilities, Gross	34	4
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	6	5
Cross currency derivatives [Member] \| Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	21	4
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	6	5
Cross currency derivatives [Member] \| Not Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	13	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	0	0
Foreign Exchange Contract [Member]
Liabilities
Derivative Liabilities, Gross	28	43
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	116	161
Foreign Exchange Contract [Member] \| Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	11	8
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	27	40
Foreign Exchange Contract [Member] \| Not Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	17	35
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	89	121
Commodity Contract [Member]
Liabilities
Derivative Liabilities, Gross	103	22
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	87	10
Commodity Contract [Member] \| Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	18	2
Commodity Contract [Member] \| Not Designated as Hedging Instruments [Member]
Liabilities
Derivative Liabilities, Gross	103	22
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative Assets, Gross	$ 69	$ 8

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