Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-Term Debt (3.50% 2032 GO Zone Refunding Bonds) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2017
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 5,283	$ 3,620
Senior Notes \| Go Zone 3.50% Bonds Due 2032 [Member]
Debt Instrument [Line Items]
Amount of bonds remarketed			$ 250
Senior Notes \| 3.50% Senior Notes Due 2032
Debt Instrument [Line Items]
Stated interest rate (percent)	3.50%
Long-term Debt, Gross	$ 250	$ 250