Long-Term Debt and Credit Facilities - Schedule of Debt Repayments (Details) - Senior Notes $ in Millions	3 Months Ended
Mar. 31, 2023 USD ($)
Long-term Debt and Credit Facilities
Repayments of debt	$ 1,535
5.625% Senior Notes, Series X, due 2025
Long-term Debt and Credit Facilities
Stated interest rate	5.625%
Repayments of debt	$ 48
7.200% Senior Notes, Series D, due 2025
Long-term Debt and Credit Facilities
Stated interest rate	7.20%
Repayments of debt	$ 21
5.125% Senior Notes due 2026
Long-term Debt and Credit Facilities
Stated interest rate	5.125%
Repayments of debt	$ 291
6.875% Debentures, Series G, due 2028
Long-term Debt and Credit Facilities
Stated interest rate	6.875%
Repayments of debt	$ 52
5.375% Senior Notes due 2029
Long-term Debt and Credit Facilities
Stated interest rate	5.375%
Repayments of debt	$ 275
4.500% Senior Notes due 2029
Long-term Debt and Credit Facilities
Stated interest rate	4.50%
Repayments of debt	$ 556
7.600% Senior Notes, Series P, due 2039
Long-term Debt and Credit Facilities
Stated interest rate	7.60%
Repayments of debt	$ 161
7.650% Senior Notes, Series U, due 2042
Long-term Debt and Credit Facilities
Stated interest rate	7.65%
Repayments of debt	$ 131

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

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