Fair Value Disclosures - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Carrying value	$ 12,828	$ 13,044
Level 2
Debt Instrument [Line Items]
Estimated fair value of long-term debt portfolio	$ 11,344	$ 13,219

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant