Debt and Borrowing Arrangements - Uncommitted and Committed Credit Lines Available (Details) - USD ($)		6 Months Ended
		Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Amount Outstanding		$ 605,000,000	$ 216,000,000
Bank loans
Debt Instrument [Line Items]
Debt instrument, term		3 years
Bank loans | Credit Facility Expiring February 27, 2024
Debt Instrument [Line Items]
Facility Amount	[1]	$ 0	4,500,000,000
Borrowed Amount	[1]	0	0
Bank loans | Credit Facility Expiring February 23, 2027
Debt Instrument [Line Items]
Facility Amount	[1]	4,500,000,000	0
Borrowed Amount	[1]	0	0
Bank loans | Multi-year Senior Unsecured Revolving Credit Facility Expiring February 27, 2024 | Revolving Credit Agreement
Debt Instrument [Line Items]
Total shareholders' equity, excluding accumulated other comprehensive earnings/(losses)		38,100,000,000
Bank loans | Multi-year Senior Unsecured Revolving Credit Facility Expiring February 27, 2024 | Revolving Credit Agreement | Minimum
Debt Instrument [Line Items]
Total shareholders' equity, excluding accumulated other comprehensive earnings/(losses)		25,000,000,000
Bank loans
Debt Instrument [Line Items]
Amount Outstanding		70,000,000	24,000,000
Bank loans | Uncommitted credit facilities
Debt Instrument [Line Items]
Facility Amount		1,326,000,000	1,367,000,000
Amount Outstanding		70,000,000	24,000,000
Bank loans | Credit Facility Expiring November 30, 2022
Debt Instrument [Line Items]
Facility Amount	[1],[2]	2,000,000,000	0
Amount Outstanding	[1],[2]	0	0
Bank loans | Credit Facility Expiring February 23, 2022
Debt Instrument [Line Items]
Facility Amount	[1]	0	2,500,000,000
Amount Outstanding	[1]	0	0
Bank loans | Credit Facility Expiring February 22, 2023
Debt Instrument [Line Items]
Facility Amount	[1]	2,500,000,000	0
Amount Outstanding	[1]	$ 0	$ 0

[1] We maintain a multi-year senior unsecured revolving credit facility for general corporate purposes, including working capital needs, and to support our commercial paper program. The revolving credit agreement includes a covenant that we maintain a minimum shareholders' equity of at least $25.0 billion, excluding accumulated other comprehensive earnings/(losses), the cumulative effects of any changes in accounting principles and earnings/(losses) recognized in connection with the ongoing application of any mark-to-market accounting for pensions and other retirement plans. At June 30, 2022, we complied with this covenant as our shareholders' equity, as defined by the covenant, was $38.1 billion. The revolving credit facility also contains customary representations, covenants and events of default. There are no credit rating triggers, provisions or other financial covenants that could require us to post collateral as security.

[2] On March 31, 2022, we entered into a supplemental term loan credit facility that can be utilized for general corporate purposes, including acquisitions. Under this agreement we may draw up to a total of $2.0 billion in term loans from the facility. The maturity dates of any loans drawn under this facility will be three years after the funding date of the applicable loan(s).