Debt (Narrative) (Details) - USD ($)		1 Months Ended		12 Months Ended
	Apr. 15, 2021	Nov. 30, 2022	Dec. 31, 2021	Dec. 31, 2022	Oct. 31, 2022	Oct. 30, 2022	May 31, 2022	Apr. 09, 2021	Apr. 08, 2021	Apr. 02, 2021	Apr. 01, 2021
Debt Instrument [Line Items]
Short-term debt			$ 17,000,000	$ 268,000,000
Commercial paper outstanding			0	0
Repayments of principal in 2023				268,000,000
Repayments of principal in 2024				1,600,000,000
Repayments of principal in 2025				518,000,000
Repayments of principal in 2026				1,200,000,000
Repayments of principal in 2027				21,000,000
Senior Notes
Debt Instrument [Line Items]
Repayments of debt	$ 500,000,000
Amended Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity										$ 2,800,000,000	$ 1,800,000,000
Revolving credit facility, amount outstanding			0	0
Uncommitted Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity							$ 250,000,000
Revolving credit facility, amount outstanding				0
Other Debt Facilities
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding			0	0
Debt instrument, unused borrowing capacity			$ 508,000,000	$ 514,000,000
Senior notes – 5.750% due 2032
Debt Instrument [Line Items]
Interest rate					5.75%
Senior notes – 5.750% due 2032 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, amount					$ 500,000,000
Senior notes – 6.250% due 2052
Debt Instrument [Line Items]
Interest rate					6.25%
Senior notes – 6.250% due 2052 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, amount					$ 500,000,000
3.30% Senior Debt Obligations Due January 2022
Debt Instrument [Line Items]
Interest rate		3.30%
Repayments of debt		$ 350,000,000
Senior notes – 2.375% due 2031
Debt Instrument [Line Items]
Interest rate			2.375%	2.375%
Senior notes – 2.375% due 2031 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, amount			$ 400,000,000
Senior notes – 2.90% due 2051
Debt Instrument [Line Items]
Interest rate			2.90%	2.90%
Senior notes – 2.90% due 2051 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, amount			$ 350,000,000
2.75% Senior Debt Obligations Due January 2022
Debt Instrument [Line Items]
Interest rate			2.75%
Repayments of debt			$ 500,000,000
Commercial Paper
Debt Instrument [Line Items]
Short-term debt					$ 2,800,000,000	$ 2,000,000,000		$ 2,000,000,000	$ 1,500,000,000
Line of Credit | New Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity				$ 1,000,000,000
Debt instrument, term				5 years