Long-Term Debt and Common Stock (Details) $ / shares in Units, shares in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2024 USD ($) extension $ / shares	Jun. 30, 2024 $ / shares	Mar. 31, 2024 $ / shares	Sep. 30, 2023 $ / shares	Sep. 30, 2024 USD ($) extension $ / shares shares	Sep. 30, 2023 $ / shares	Nov. 07, 2024 USD ($) $ / shares	Dec. 31, 2023 USD ($)	Nov. 30, 2021 USD ($)
Debt Instrument Table [Line Items]
Aggregate principal amount	$ 34,000,000				$ 34,000,000			$ 34,000,000
Stock repurchase program, authorized amount									$ 5,000,000,000
Stock repurchased during period, shares | shares					18.0
Stock repurchased during period, value					$ 2,198,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 1,800,000,000				1,800,000,000
Estimated federal excise taxes					$ 20,000,000
Common stock dividends declared (in USD per share) | $ / shares	$ 0.91	$ 0.91	$ 0.91	$ 0.825	$ 2.73	$ 3.475
Subsequent Event
Debt Instrument Table [Line Items]
Stock repurchase program, authorized amount							$ 10,000,000,000
Dividends Payable, Amount Per Share | $ / shares							$ 0.975
Revolving Credit Agreement | Revolving Credit Facility
Debt Instrument Table [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,900,000,000				$ 1,900,000,000
Line of credit facility, maturity term extensions | extension	2				2
Line of credit facility, extension period	1 year				1 year
Line of credit facility increase additional borrowings (not to exceed)					$ 3,000,000,000
Maximum total debt to total capitalization ratio allowed under financial covenant	65.00%				65.00%
Revolving Credit Agreement | Revolving Credit Facility | Secured Overnight Financing Rate (SOFR)
Debt Instrument Table [Line Items]
Debt Instrument, basis spread on base rate (as a percent)					0.10%
Revolving Credit Agreement | Revolving Credit Facility | Eurodollar
Debt Instrument Table [Line Items]
Weighted average interest rate (in hundredths)					5.85%
Revolving Credit Agreement | Revolving Credit Facility | Base Rate
Debt Instrument Table [Line Items]
Weighted average interest rate (in hundredths)					8.00%
Commercial Paper
Debt Instrument Table [Line Items]
Line of credit facility, current borrowing capacity	$ 0				$ 0			$ 0
Senior Notes | Senior Notes Due 2025
Debt Instrument Table [Line Items]
Aggregate principal amount	$ 500,000,000				$ 500,000,000
Debt instrument, interest rate (as a percent)	3.15%				3.15%