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Long-Term Debt - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Long-term Debt
Payments of long-term debt			$ 7,108	$ 174
Long-term debt, gross	$ 20,361		20,361		$ 28,493
Net book value of debt	21,562		21,562		29,028
Level 1 \| Estimate of Fair Value Measurement
Long-term Debt
Fair value of long-term debt	20,000		20,000		$ 31,100
Senior Notes
Long-term Debt
Payments of long-term debt			7,100
Long-term debt, gross	8,100		8,100
Net book value of debt	7,400		7,400
Gain on debt extinguished			$ 161
Senior Notes Due from 2024 Through 2049 \| Senior Notes
Long-term Debt
Payments of long-term debt	$ 4,800
Senior Notes Due from 2022 Through 2049 \| Senior Notes
Long-term Debt
Payments of long-term debt		$ 3,300