Debt - Senior Notes (Details) - USD ($)		1 Months Ended	12 Months Ended
	May 23, 2022	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2023	Aug. 20, 2020	May 26, 2020	Aug. 13, 2018	Aug. 31, 2017	Nov. 30, 2015
Revolving Credit Facility
Debt Instrument [Line Items]
Debt issuance costs			$ 4,000,000
Senior Notes
Debt Instrument [Line Items]
Face amount	$ 8,000,000,000				$ 6,500,000,000	$ 2,500,000,000	$ 2,250,000,000	$ 1,000,000,000	$ 2,500,000,000
Extinguishment of debt and refinancing costs	30,000,000
Extinguishment of debt	18,000,000
Interest expense, debt	7,000,000
Unamortized debt issuance expense	5,000,000
Debt issuance costs					53,000,000	23,000,000	21,000,000	8,000,000
Commercial Paper | Revolving Credit Facility
Debt Instrument [Line Items]
Funds reserved for commercial paper program									1,600,000,000
2028 Senior Notes (3.625% senior notes due September 1, 2028) | Senior Notes
Debt Instrument [Line Items]
Face amount				$ 1,000,000,000
Interest rate, stated percentage (in percentage)				3.625%
2025 Senior Notes (3.75% senior notes due December 1, 2025) | Senior Notes
Debt Instrument [Line Items]
Face amount	$ 1,250,000,000
Interest rate, stated percentage (in percentage)	3.65%			3.75%
2027 Senior Notes (4.00% senior notes due September 15, 2027) | Senior Notes
Debt Instrument [Line Items]
Face amount	$ 1,500,000,000
Interest rate, stated percentage (in percentage)	4.00%			4.00%
2029 Senior Notes (4.35% senior notes due June 15, 2029) | Senior Notes
Debt Instrument [Line Items]
Face amount	$ 1,250,000,000
Interest rate, stated percentage (in percentage)	4.35%			4.35%
2033 Senior Notes (4.60% senior notes due March 15, 2033) | Senior Notes
Debt Instrument [Line Items]
Face amount	$ 1,500,000,000
Interest rate, stated percentage (in percentage)	4.60%			4.60%
2052 Senior Notes (4.95% senior notes due June 15, 2052) | Senior Notes
Debt Instrument [Line Items]
Face amount	$ 1,500,000,000
Interest rate, stated percentage (in percentage)	4.95%			4.95%
2062 Senior Notes (5.20% senior notes due June 15, 2062) | Senior Notes
Debt Instrument [Line Items]
Face amount	$ 1,000,000,000
Interest rate, stated percentage (in percentage)	5.20%			5.20%
SMR Notes | Senior Notes
Debt Instrument [Line Items]
Proceeds from (repayments of) debt	$ 4,900,000,000		4,900,000,000
Debt issuance costs, net	67,000,000
2033 and 2052 Senior Notes | Senior Notes
Debt Instrument [Line Items]
Proceeds from (repayments of) debt	3,000,000,000
Redemption amount	$ 2,700,000,000
2025 Term Loan due August 31, 2025 | Senior Notes
Debt Instrument [Line Items]
Face amount					1,250,000,000
2023 Senior Notes (0.70% senior notes due June 15, 2023) | Senior Notes
Debt Instrument [Line Items]
Face amount					$ 1,000,000,000
Interest rate, stated percentage (in percentage)					0.70%
Extinguishment of debt		$ 1,250,000,000
Interest expense, debt			$ 4,000,000
2032 Senior Notes (1.85% senior notes due September 15, 2032) | Senior Notes
Debt Instrument [Line Items]
Face amount					$ 1,500,000,000
Interest rate, stated percentage (in percentage)				1.85%	1.85%
2040 Senior Notes (2.65% senior notes due September 15, 2040) | Senior Notes
Debt Instrument [Line Items]
Face amount					$ 1,250,000,000
Interest rate, stated percentage (in percentage)				2.65%	2.65%
2060 Senior Notes (3.00% senior notes due September 15, 2060) | Senior Notes
Debt Instrument [Line Items]
Face amount					$ 1,500,000,000
Interest rate, stated percentage (in percentage)				3.00%	3.00%
2030 Senior Notes (2.10% senior notes due June 15, 2030) | Senior Notes
Debt Instrument [Line Items]
Face amount						$ 1,250,000,000
Interest rate, stated percentage (in percentage)				2.10%		2.10%
2050 Senior Notes (3.00% senior notes due June 15, 2050) | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percentage)				3.00%		3.00%
Senior Notes Due December 2020 | Senior Notes
Debt Instrument [Line Items]
Face amount						$ 1,250,000,000
Interest rate, stated percentage (in percentage)						2.75%
3.45% Senior Notes due September 21, 2023 | Senior Notes
Debt Instrument [Line Items]
Face amount							$ 400,000,000
Interest rate, stated percentage (in percentage)							3.45%
2028 Senior Notes (3.75% senior notes due September 21, 2028) | Senior Notes
Debt Instrument [Line Items]
Face amount							$ 600,000,000
Interest rate, stated percentage (in percentage)				3.75%			3.75%
2048 Senior Notes (4.25% senior notes due September 21, 2048) | Senior Notes
Debt Instrument [Line Items]
Face amount							$ 1,250,000,000
Interest rate, stated percentage (in percentage)				4.25%			4.25%
2018 Senior Notes (2.50% senior unsecured notes due October 15, 2018) | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percentage)							2.50%
Aggregate principal amount to be funded upon redemption							$ 600,000,000
2022 Senior Notes | Senior Notes
Debt Instrument [Line Items]
Face amount								$ 500,000,000
Percentage bearing fixed interest, rate (in percentage)								2.35%
2027 Senior Notes | Senior Notes
Debt Instrument [Line Items]
Face amount								$ 500,000,000
Percentage bearing fixed interest, rate (in percentage)								3.10%
NYSE Notes | Senior Notes
Debt Instrument [Line Items]
Face amount								$ 850,000,000
Percentage bearing fixed interest, rate (in percentage)								2.00%
2025 Senior Notes | Senior Notes
Debt Instrument [Line Items]
Face amount									$ 1,250,000,000
Percentage bearing fixed interest, rate (in percentage)									3.75%